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WorksheetsForces and Motion
Total questions: 70
Worksheet time: 51mins
What did Isaac Newton discover when the apple supposedly fell on his head?
Gravity
Electricty
Hydrogen
Plasma
According to Newton, what kinds of objects are affected by gravity?
Only objects inside the earth's atmosphere, like apples.
Only objects that orbit the sun, like planets.
Only objects with a lot of mass, like human beings.
All objects in the universe.
How is the moon's orbit around the earth related to an apple falling from a tree?
The earth's gravity keeps the moon in orbit, and also pulls objects toward the ground.
The earth, the moon, and an apple are all spherical, so they all have gravity.
The moon's gravity holds apples on tree branches, while the earth's gravity pulls apples toward the ground.
The moon's gravity affects bodies of water; the earth's gravity affects solid objects.
If the net force on an object is zero, what can you conclude?
The object is not accelerating
The object is not touching anything
The object is not moving
The object is slowing down
What can you infer about an object moving at a constant velocity?
No forces are acting on it
Gravity is exerting the strongest force on it
The forces acting on it are in balance
It is stationary
Acceleration occurs when an object is subjected to a(n):
Force
Balanced force
Unbalanced force
Contact force
Which of the following statements is always true?
An object at rest has no forces acting on it
Unbalanced forces lead to a change in speed or direction
Gravity always leads to an unbalanced force
The net force on a moving object can never be zero
What will happen if you're in a car, and the driver slams on the brake?
You will stop moving.
You will continue moving forward.
You will gradually slow down.
You will speed up.
According to Newton's first law, an object in motion will stay in motion unless:
An opposing force acts on it.
It's in outer space.
It stops.
It remains at rest.
What causes a ball rolling across a rug to slow to a stop?
The rug doesn't have enough force to hold the ball.
Friction resists the ball's forward motion.
The rug doesn't have enough momentum to keep the ball moving.
The ball isn't moving fast enough.
Which of the following is NOT true about friction?
It occurs any time two objects are in contact
It always acts in the opposite direction as motion
It always acts in the same direction as motion
It prevents objects on earth from staying in motion forever
If an unbalanced force acts on an object, what will happen?
It will not move at all.
It will accelerate in the same direction as the force.
It will accelerate in the opposite direction to the force.
It will accelerate at an angle of 90 degrees to the force.
What is net force?
A force associated with the Internet
The combined forces acting on a particular object
The same thing as inertia
The same thing as gravity
According to Newton's third law, what happens when you push against a wall?
The wall pushes back at you half as hard as you push against it.
The wall doesn't resist at all.
The wall pushes back at you with the same amount of force.
The wall pushes back at you twice as hard as you push against it.
Which has more Inertia? (so it needs more force to move)
Truck
Ant
A cat
A skateboard
If you know that the forces acting on an object are balanced, then which of the following must be true?
The object will definitely be standing still.
The object will definitely be moving.
The object will either be standing still, or moving with constant velocity.
The object will be accelerating.
Which of the following is an example of balancing forces?
A Book resting on the table.
A pencil is knocked off the desk.
Which of the following is an example of an unbalanced force?
A book resting on the table.
A pencil that is knocked to the ground.
A push or a pull is called a
Gravity
Force
What is Newton's 1st Law?
For every action there is an equal and opposite reaction.
An object at rest will stay at rest, an object in motion will stay in motion, unless an unbalanced force acts upon it.
What is Newton's 2nd Law?
For every action there is an equal and opposite reaction.
Acceleration depends on two variables, the mass of the object and the amount of force.
What is Newton's 3rd Law?
For every action there is an equal and opposite reaction.
Acceleration depends on two variables, the mass of the object and the amount of force.
What explains why objects resist changes in their state of motion?
gravity
inertia
force
friction
What explains a quantity that has BOTH speed and direction?
Inertia
Force
Speed
Velocity
Newton's first law states that an object must travel at a constant speed and in ___________, unless an unbalanced force acts on it.
in a circle
a wave like manner
the same direction
What would happen if a ball was kicked is space?
It continues in the same direction, speeding up as it goes.
It continues in the same direction, speeding up as it goes.
It continues to move in the same direction unless it hits something or is affected by gravity or another force.
Which way would a swimmer push to move forward in the water?
To the left
Forward
Backward
To the right
Looking at the image. Decide if this is balanced or unbalanced.
Unbalanced
Balanced
Looking at the image. Decide if this is balanced or unbalanced.
Unbalanced
Balanced
Suppose an Astronaut floating in space throws a rock. What will happen to the rock?
It will continue to move in the same direction, speeding up as it moves.
It will continue to move at the same speed and in the same direction until it is acted upon by another force.
The force that prevents a ball rolling on the ground from continuing on it's path forever is...
Friction
Gravity
Inertia
If an object is accelerating, then the forces actin on it must be:
Balanced
Unbalanced
In which of the following cases does the car have no acceleration ?
A car shortly after a stoplight turns green.
A car approaching a red light
A car traveling at a constant speed and direction.
A car turning a curve at a constant speed
A Car traveled 240 Km in 5 Hours
It takes Mrs. Shields 13 hours to drive from Houston to her hometown of St. Louis, which is a distance of 780 miles. What is the average speed of this trip?
(a)
How far had the bird flown after 75 minutes?
10 kilometers
15 kiometers
20 kilometers
25 kilometers
True or False: There are always more than one forces acting on any object that is on Earth.
True.
False.
