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WorksheetsACAP - Energy & Forces Review
Total questions: 145
Worksheet time: 1hrs 11mins
Conservation of energy means that:
Energy CAN be created but CANNOT be destroyed
Energy CANNOT be created and CANNOT be destroyed
Energy CANNOT be created but CAN be destroyed
In the picture above, kinetic energy is being converted INTO potential energy (Kinetic --> Potential) from:
Point A to point B
Point B to point C
Energy is not being converted
In the picture above, potential energy is being converted INTO kinetic energy (potential --> kinetic) from:
Point A to point B
Point B to point C
Energy is not being converted
In the picture above, as the car moves from point A, to point B and finally to point C, the TOTAL energy of the car:
Decreases from point A to point B, then increases from point B to point C
Increases from point A to point B, then decreases from point B to point C
Stays the same because energy is conserved, but is converted between potential and kinetic energy
In the picture above, which ball has the most potential energy.
Ball A
Ball E
Ball I
In the picture above, which ball has the most kinetic energy?
Ball A
Ball E
Ball I
In the picture above, which two balls have the same potential energy?
Balls D and G
Balls E and F
Balls B and H
In the picture above, which ball has more kinetic energy, ball B or ball D?
Ball B
Ball D
Which of the following is the best example of chemical energy being transformed into light energy and heat energy?
Boiling water on an electric stove
Turning on a battery powered flashlight
Watching a movie on a television
Which of the following is the best example of energy being transferred?
Johnny is sitting in a chair
Johnny hits a baseball with a baseball bat
Johnny is sleeping
Doug builds a model roller coaster with 3 hills, as shown in the picture. The toy car stops at point X. What changes can he make that would allow the toy car to travel over all 3 hills?
Add a loop before the first hill in order to maximize the kinetic energy of the car.
Order the 3 hills from shortest to tallest so that the potential energy builds up according to the height of each hill.
Add a loop after the tallest hill in order to maximize the kinetic energy of the car.
Order the 3 hills from tallest to shortest to provide the potential energy needed for the car to make it over each hill.
According to Newton’s Second Law of motion, if you apply a greater force, then the acceleration will be:
Greater/Faster
Lesser/Slower
Stay the Same
According to Newton’s Third Law the reaction force is always equal in size and acts in the ______________ direction
Same
Perpendicular
Opposite
Identify which one of Newton’s Laws is being described. For every action force, there is an equal but opposite reaction force.
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Identify which one of Newton’s Laws is being described. When a car stops quickly by applying the brakes, the passengers fly forward until stopped by their seatbelt.
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Identify which one of Newton’s Laws is being described. A heavier golf club takes more force to swing.
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Identify which one of Newton’s Laws is being described. When Mary adds more items to her grocery cart, she notices it becomes hard to push the cart
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Which object has more inertia?
A ping pong ball with a mass of 2.7 g
A baseball with a mass of 145 g
A basketball with a mass of 624 g
If an object is at rest, the forces acting on it are?
Balanced
Unbalanced
Weak
Inertia is dependent on an objects:
Magnitude
Mass
Weight
Inertia causes an object at rest to:
start moving
have an increase in velocity
remain at rest
Which charge would have the strongest attraction force?
Opposite Charges
attract
repel (push away)
Like charges
attract
repel (push away)
Magnets with opposite poles
attract
repel (push away)
Magnets with like poles
attract
repel (push away)
Which magnets have the strongest attraction force between the poles?
What are the forces between the following magnets pictured below?
The attract each other
They repel each other
They do not react to each other
What are the forces between the magnets pictured below?
They attract each other
The repel each other
The do not react to each other
If a wire is carrying current, it produces a:
Potential Energy
Kinetic Energy
Magnetic Field
What happens to the electric force between two charged objects as the distance between them increases (gets bigger)?
The force increases (gets bigger)
The force decreases (gets smaller)
The force remains constant
Electric force fields exist between charged objects when:
only when they are touching
only when they are touching
even when they are not touching
Which has the strongest force between the charges?
Where are magnets the strongest?
At the poles
At the center
They are equally strong all over
What is one way that you can strengthen an electromagnet?
Turn the electromagnet off
Remove the iron core (nail) from the electromagnet
Increase the number of coils around the iron core (nail)
What happens to the magnetic force when you increase the number of wire turns in an electromagnet?
The magnetic force decreases
The magnetic force stays the same
The magnetic force increases
When two objects have the same type of charge, what happens?
They attract each other
They repel each other
Nothing happens
What happens to the electric force between two charged objects as the distance between them decreases (gets smaller)?
The force increases (gets stronger)
The force decreases (gets weaker)
The force remains constant
When electric charges or magnets are near each other, they experience forces:
Only when they are touching
At a distance, that is why they are called "non-contact forces"
Out of the following listed below, what would make the electromagnet stronger?
using a larger iron core (for example a thicker iron nail)
pushing the coils (wire turns) closer together
decreasing the current
Out of the following listed below, what would make the electromagnet stronger?
Less wire turns
Adding more batteries to produce more electric current
Using a wooden stick instead of a nail
What happens to the magnetic force between two charged objects as the distance between them decreases (gets smaller)?
The force increases (gets stronger)
The force decreases (gets weaker)
The force remains constant
What happens to the magnetic force between two charged objects as the distance between them increases (gets bigger)?
The force increases (gets stronger)
The force decreases (gets weaker)
The force remains constant
Out of the following listed below, what would make the electromagnet stronger?
greater number of wire turns
decreasing the current
smaller number of wire turns
The space of area around a magnet where the magnetic force acts is:
The magnetic field
the magnetic domain
the electric field
A horse is pulling forward on a wagon with a force of 200 N. According to Newton's 3rd Law, what other force MUST be happening?
The horse is pushing backward on the wagon with a force of 200 N
The ground is pushing backward on the horse with a force of 200 N
The wagon is pulling backward on the horse with a force of 200 N
A canoe paddle is pushing backward on the water in a lake with a force of 120 N. According to Newton's 3rd Law, what other force MUST be happening?
The water is pushing forward on the canoe paddle with a force of 120 N.
The canoe paddle is pushing forward on the canoe with a force of 120 N.
The water is pulling forward on the canoe paddle with a force of 120 N.
Colin is walking his dog. A squirrel just ran by and the dog is pulling forward on the leash with a force of 250 N. Colin is pulling backward on the leash with a force of 180 N. Assume all other forces o the leash are balanced. Which statement describes the forces on the leash?
The forces are balanced, so there is no net force on the leash.
The forces are unbalanced, so there is a net force on the leash.
Dan, Bryan and Emmett are playing tug-of-war. Dan is pulling the rope to the left with a force of 450 N. Bryan and Emmet are both pulling the rope to the right. Bryan is pulling with a force of 270 N, and Emmet is pulling with a force of 230 N. Assume all other forces on the rope are balanced. Which statement describes the forces on the rope?
The forces are balanced, so there is no net force on the rope.
The forces are unbalanced, so there is a net force on the rope.
As a roller coaster went up the hill, ______________ was converted into ____________.
gravitational potential energy ...... kinetic energy
kinetic energy ....... gravitational potential energy
As the roller coaster went down the hill, ______________ was converted back into _______________.
gravitational potential energy ...... kinetic energy
kinetic energy ...... gravitational potential energy
As the roller coaster rushed down the hill, gravitational potential energy was converted into kinetic energy. Which piece of evidence best supports this claim?
The train kept moving when it reached the flat part of the track.
The speed of the train increased as the height of the train decreased.
The people in the train felt like they were being pushed at the bottom of the hill.
What does Newton’s Law of Motion say?
An object at rest stays at rest, an object in motion stays in motion, unless acted on by an outside force.
For every action there is an equal and opposite reaction.
The force acting on an object is equal to the mass of that object times its acceleration.
Newton's First Law is also known as the:
Law of Physics
Law of Inertia
Law of Movement
An object that is accelerating or decelerating, has zero net force acting on it (balanced force).
TRUE
FALSE
An object in motion stays in motion and an object at rest stays at rest until...
Objects in motion naturally come to rest
An unbalanced force acts on it
A balanced force acts on it
Which object has more inertia?
A ping pong ball with a mass of 2.7 g
A baseball with a mass of 145 g
A basketball with a mass of 624 g
Inertia is dependent on an objects:
Magnitude
Mass
Weight
Inertia causes an object at rest to:
start moving
have an increase in velocity
remain at rest
The normal force is a force that is:
A contact force that a surface exerts on an object
A fictional force that doesn't really exist
A downward force that exists between two objects containing mass
Calculate the net force acting on the box.
2 N, Left
1 N, Right
5 N, Left
Calculate the net force acting on the box.
9 N, Right
3 N, Right
9 N, Left
Calculate the net force acting on the box.
4 N, Right
7 N, Left
1 N, Right
Calculate the net force acting on the box.
6 N, Left
3 N, Left
3 N, Right
A student pushes a cart so that it moves to the right at 2 m/s for 10 seconds. The cart does not speed up or slow down. Which statement best describes the cart's motion?
The cart is accelerating because it is moving
The cart is accelerating because a force is being applied
The cart is not accelerating and is moving at a constant velocity
A hockey puck slides across the ice at a constant speed in a straight line. Which statement best describes the forces acting on the puck?
The forces are unbalanced
The forces are balanced
A car moves at a constant speed but turns around a curve. Is the car accelerating?
No, because the forces are balanced.
No, because the speed stays the same.
Yes, because the direction is changing.
According to Newton’s Second Law of motion, if you apply a greater force, then the acceleration will be:
Greater/Faster
Lesser/Slower
Stay the Same
According to Newton’s Second Law of motion, if you apply a lesser force, then the acceleration will be:
Greater/Faster
Lesser/Slower
Stay the Same
If equal forces are applied to two objects, one with a small mass and one with a large mass, which object will have the greatest acceleration?
The object with the large mass
The object with the small mass
They will both have the same acceleration
Newton’s third law says that every time there is an action force, there is also a ____________ force.
Reaction
Applied
Frictional
According to Newton’s Third Law the reaction force is always equal in size and acts in the ______________ direction
Same
Perpendicular
Opposite
Newton’s Third Law states that forces must always occur in:
By itself
Pairs
Forces never occur
Identify which one of Newton’s Laws is being described. A heavier golf club takes more force to swing.
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Identify which one of Newton’s Laws is being described. A magician pulls a table cloth out from under dishes and glasses set on top of the table.
Newton's 1st Law
Newston's 2nd Law
Newton's 3rd Law
Identify which one of Newton’s Laws is being described. A rocket lifts off the launch pad due to the exhaust pushing down on the ground and the ground pushing back with an equal but opposite force.
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Identify which one of Newton’s Laws is being described. When Mary adds more items to her grocery cart, she notices it becomes hard to push the cart
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Consider a football flying through the air, what forces are acting on the football? Neglect air resistance.
Gravitational Force and Normal Force
Gravitational Force
Gravitational Force and Frictional Force
What is the force called that keeps us on earth? This is the force that pulls objects down towards the center of the Earth.
Kinetic Force
Gravitational Force
Frictional Force
What is the force caused by objects rubbing against each other? It opposes the motion of an object.
Frictional Force
Potential Force
Applied Force
Consider a boy swimming. Which of the following describes the basic action/reaction forces between the boy and the water?
The only force is the activity of the fish moving forward
The force of the boy’s hand against the water and the force of the water against the boy’s hand are equal but in opposite directions
The forces point in the same direction because forces in liquid media behave differently than forces in air.
A foot pushing on the ball and the ball pushing back on the ball is a demonstration of Newton's 1st Law of Motion.
TRUE
FALSE
The graph below shows the velocity of a fan car over time.
The velocity increases each second.
What can be concluded about the motion of the fan car?
The fan car is moving with a constant velocity
The fan car is slowing down
The fan car is accelerating
Two fan cars are pushed with the same force.
Car A has a mass of 1 kg.
Car B has a mass of 2 kg.
Which statement is correct?
Both cars will have the same acceleration
Car A will accelerate more
Car B will accelerate more
Two fan cars are pushed with the same force.
Car A has a mass of 1 kg.
Car B has a mass of 2 kg.
Which statement is correct?
Both cars will have the same acceleration
Car A will accelerate more
Car B will accelerate more
A cart experiences a force of 5 N to the right and a force of 5 N to the left.
What will happen to the cart?
It will move to the right
It will move to the left
It will move at a constant velocity or remain at rest
When a student pushes against a wall, which pair of forces represents an action-reaction pair acting on the wall?
The force of the student pushing on the wall and the force of the wall pushing back on the student
The force of the student pushing on the wall and the force of gravity pushing down on the student.
The force of the student pushing on the wall and the normal force pushing up on the student from the floor.
Several sports balls of different masses (such as a tennis ball, soccer ball, and basketball) are thrown at the same speed.
Which graph best represents the relationship between the mass of the ball and its kinetic energy?
Graph A
Graph B
Graph C
Graph D
Which graph best represents the relationship between the speed of the bicyclist and kinetic energy?
Graph A
Graph B
Graph C
Graph D
What does this graph show?
Kinetic energy increases at a constant rate as velocity increases
Kinetic energy decreases as velocity increases
Kinetic energy increases more rapidly (exponentially) as velocity increases
What conclusion can be drawn from the data table?
increasing mass increases kinetic energy, when velocity stays the same
increasing mass decreases the kinetic energy
mass does not affect kinetic energy
Two identical springs are shown in a model. One spring is stretched twice as far as the other. Which spring has the most stored elastic potential energy?
The unstretched spring has more potential energy
The spring stretched the farthest has more potential energy
Both springs have the same amount of potential energy
Which stores elastic potential energy?
a battery
a book on a shelf
a stretched rubber band
A ball rolls up a ramp and slows down until it stops.
Why does the ball slow down?
Energy is destroyed
Kinetic energy is transformed into potential energy
Gravity removes energy
Which stores elastic potential energy?
a battery
a book on a shelf
a stretched rubber band
What are three ways static electricity can be created?
Insulation, Voltage, Current
Circuit, Electric Field, AC
Friction, Induction, Conduction
The _____________ is the push or pull between objects due to their charges.
electric force
applied force
normal force
What happens to the magnetic force between two charged objects as the distance between them decreases (gets smaller)?
The force increases (gets stronger)
The force decreases (gets weaker)
The force remains constant
What happens to the magnetic force between two charged objects as the distance between them increases (gets bigger)?
The force increases (gets stronger)
The force decreases (gets weaker)
The force remains constant
A simple circuit includes a battery, wires, and a light bulb.
Which sequence correctly describes the energy transformations in this system?
Electrical → chemical → light
Chemical → kinetic → sound
Chemical → electrical → light and heat
In a circuit, what is the main role of the wires?
To store electrical energy
To transform electrical energy into light
To transfer electrical energy through the circuit
A resistor is added to a circuit with a battery and a light bulb.
What happens to the current in the circuit?
The current increases
The current decreases
The current stays the same
The diagram shows electric field lines around charged objects. Charge B has field lines closer together.
What does the closer spacing of field lines around charge B mean?
It has a stronger electric force
It has a weaker electric force
It has no force
Two electromagnets are shown:
Electromagnet A: 10 wire coils, 1 battery
Electromagnet B: 20 wire coils, 1 battery
Why is Electromagnet B stronger?
It has less current
It has less resistance
It has more wire turns, increasing the magnetic field
Char is riding his skateboard up a steep hill and notices he is not going as fast as when he was going downhill. What energy transformation is taking place?
The skateboarder's kinetic energy increases and changes into sound energy.
The skateboarder's kinetic energy decreases and is converted into potential energy.
The skateboarder is losing potential energy while gaining kinetic energy.
Both kinetic and potential energy decrease at the same time.
During a washing machine's cycle, electrical energy is transformed into other types of energy. Which of the following are correct transformations?
Mechanical energy and sound energy
Mechanical energy only
Nuclear energy
Solar energy
A student builds a circuit with a battery, a resistor, and a light bulb. What will most likely happen to the brightness of the bulb if the resistor has higher resistance?
The bulb gets brighter because higher resistance increases voltage.
The bulb stays the same brightness.
The bulb goes out completely.
The bulb gets dimmer because less current flows through the circuit.
Which statement best explains the energy transformation seen in the image (a hydroelectric dam)?
Chemical energy → kinetic energy → electrical energy
Potential energy of water → kinetic energy → electrical energy
Kinetic energy → nuclear energy → electrical energy
Water energy is completely lost in the dam
Which graph best represents the relationship between velocity and kinetic energy?
A student builds a simple circuit with a battery, wires, and a resistor. What energy transformation takes place at the resistor?
Electrical → sound
Electrical → light
Electrical → thermal
Electrical → chemical
At which point in a swing does the trapeze artist have the most potential energy and least kinetic energy?
Position 1
Position 2
Position 3
Position 4
Which position shows potential energy at its maximum and kinetic energy at its minimum?
Position A
Position B
Position C
All positions have equal energy
What type of energy transformation does a fan produce?
Sound → chemical
Electrical → kinetic and sound
Electrical → heat and chemical
No energy transformation occurs
A buzzer connected to a battery makes sound and becomes slightly warm. What energy transformation occurs?
Chemical → sound
Electrical → stored energy
Chemical → electrical → sound and thermal
Sound → electrical
When an object is lifted off the ground, its ____ potential energy ____.
Elastic — decreases
Chemical — stays the same
Gravitational — increases
Gravitational — decreases
If you double an object's mass while keeping velocity constant, what happens to kinetic energy?
It doubles
It quadruples
It stays the same
It does not depend on mass
Kai and Taz are measuring the amount of kinetic energy of bowling balls with different masses for a science experiment. Based on a graph relating mass and kinetic energy, which statements are true?
As mass increases, kinetic energy increases
Kinetic energy decreases as mass increases
Kinetic energy remains constant
Mass and kinetic energy are directly proportional
A car travels at 3 m/s and turns left around a curve while keeping the same speed. Does the car have acceleration?
No, because velocity stayed the same
Yes, because the direction changed
No, because displacement changed
Yes, because the car slowed down
A soccer ball is moving forward across the grass. Which force acts in the opposite direction of the motion and slows it down?
Gravitational force
Applied force
Frictional force
Normal force
Forces such as gravity and magnetism are called:
Balanced forces
Internal forces
Non-contact forces
Applied forces
Which statement best describes Newton’s Second Law of Motion?
Objects stay in motion unless acted on by a force
Force equals mass times acceleration
For every action there is an equal reaction
Energy cannot be created or destroyed
Which device converts electrical energy into mechanical energy?
Electromagnet
Electric motor
Battery
If the mass of an object increases while the force stays the same, what happens to acceleration?
It increases
It decreases
It stays the same
It becomes zero
A marble rolls across a carpet and eventually stops. What outside force caused the marble to stop?
Reaction force
Frictional force
Internal force
Rolling force
A soccer ball hits the ground with an action force of 32 N. The ground pushes back up with an equal force. Which law explains this?
Newton’s First Law
Newton’s Second Law
Newton’s Third Law
A box has a 65 N force pushing right and a 55 N force pushing left. Vertical forces cancel out. In which direction will the box move?
Right
Left
Up
It will not move
A block has a 20 N upward normal force and a 20 N downward gravitational force. What type of forces are acting on the block?
Unbalanced forces
Balanced forces
Magnetic forces
A ball is thrown upward. Which force is always pulling the ball downward while it is in the air?
Magnetic force
Gravitational force
Frictional force
Applied force
A crate is pushed with 100 N to the right while friction pushes 40 N left. What is the net force?
60 N right
60 N left
140 N right
40 N left
Two magnets are placed with the north pole facing the north pole. What happens?
They attract
They repel
They stick together permanently
No force occurs
A ball resting on a table experiences gravity downward and normal force upward. Why does it remain still?
Forces are unbalanced
Forces are balanced
No gravity exists
The table pushes sideways
The table below displays information about three pairs of interacting charged particle. Which pair of charges has the strongest repulsive electric force between them?
Pair 1
Pair 2
Pair 3
The table below displays information about three pairs of interacting charged particle. Which pair of charges has the strongest attractive electric force between them?
Pair 1
Pair 2
Pair 3
The diagram below ranks four planets by mass from the greatest amount of mass to the least amount. Which planet(s) have a stronger gravitational force than Earth?
Jupiter and Neptune
only Jupiter
only Venus
Jupiter and Venus
Based on the diagram below, what object is Earth exerting the greatest gravitational force on?
aurora
meteors
satellite
weather balloon
Your teacher lays out four electromagnets and tells you to choose one to pick up a pile of iron shavings. The elements of each electromagnet are listed in the table below. Which electromagnet would be the strongest, and should you pick to complete the task the fastest?
Electromagnet #1
Electromagnet #2
Electromagnet #3
Electromagnet #4
A student kicks three different balls, each with a different mass. He kicks them with the same amount of force and then records their acceleration. He enters the data for each kick in the table below. What can you conclude about acceleration from the data table?
acceleration decreases as mass decreases
acceleration increases as force increases
acceleration increases as mass decreases
acceleration decreases as force increases
A soccer ball hits the ground with an action force of 32 N. The ground responds with a reaction force of equal magnitude, causing the ball to bounce. Which of the following explains the soccer ball's motion?
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
The image shows an electromagnet your teacher built for your class. Which of the following three ways could you increase the electromagnetic force of the electromagnet?
Increase the number of coils
Increase the length of the wire
Increase the size of the iron core
Increase the voltage of the battery (add more batteries)
Push the coils closer together
Click the dot that has the greatest gravitational potential energy.
Click the dot that has the greatest kinetic energy.
Which pair of magnets has the strongest magnetic force?
Which pair of magnets has the strongest magnetic force?
Which pair of magnets has the weakest magnetic force?
Which pair of magnets has the weakest magnetic force?
