Font size
WorksheetsDynamics (Forces)
Total questions: 97
Worksheet time: 3620secs
If the net force is equal to zero, the forces acting on the object are
balanced
unbalanced
Which example would be a balanced force?
Train moving at a constant speed in the same direction.
A skier going down a hill.
A basketball being passed to a teammate.
An apple falling to the floor.
A ball falling back to the ground is an example of which force?
magnetism
gravity
electricity
attraction
Check ALL examples that show gravity at work.
Which shows an example of unbalanced forces?
When 2 forces are __________, the forces are balanced.
unequal
equal
very strong
weak
Friction _____________ motion
Works in the same direction as
Opposes
Has not effect on
Pulls against
When you go down a slide which two forces are competing in a tug of war?
Gravity and Sliding Friction
Gravity and Rolling Friction
Gravity and Your Friend Pushing You
Gravity and Pushing Friction
If you are unable to make it to the bottom of the slide, who won the tug of war between sliding friction and gravity?
There is no winner, and your sad because you're stuck on a slide
Gravity won
Neither, its a tie
Sliding friction won
Friction is an example of _____________
contact force
non contact force
both of these
none of these
which one is balance ?
What is the definition of net force?
a push or a pull that acts on an object
Net force equal 0N and there is no change in the object's motion
the overall force acting on an object after all the forces are combined
The force does not equal 0N, the object accelerates
What do we call a force that has a net force of zero Newtons and the object does not change its motion?
balanced force
unbalanced force
acceleration force
net force
What do we call a force that causes an object to accelerate?
net force
moving force
acceleration force
unbalanced force
What is the magnitude and direction of the force in the free body diagram shown?
70 N right
70 N left
50 N right
50 N left
What is the magnitude and direction of the force in the free body diagram shown?
35 N right
17 N right
11 N right
5 N right
When an object is moving, friction acts in the _______ direction as the motion.
perpendicular
same
opposite
precise
The type of friction that prevents an object from moving is called _______ friction.
rolling
fluid
kinetic
static
How would the absence of friction affect the motion of a marble on a long, straight path?
The marble's speed would decrease.
The marble's speed would remain constant.
The marble's speed would increase.
The marble would stop immediately.
Which of the following is an example of rolling kinetic friction?
A box sliding across the floor.
A car skidding to a stop.
A soccer player making a slide tackle.
A bike being ridden on a road.
The equation for the force of friction is _______.
Ff = µFg
Ff = µFN
Ff = µFT
Ff = µFs
What affect would decreasing the normal force between two objects have on the force of friction?
The force of friction would increase.
The force of friction would decrease.
The force of friction would remain the same.
The force of friction would disappear completely.
The weight of an object ...
Is the same everywhere
varies according to location
An object in motion tends to stay in motion and an object at rest tends to stay at rest until acted on by an unbalanced force is which of Newton's laws?
1st
2nd
3rd
4th
The acceleration of an object is dependent upon the net force acting upon the object and the mass of the object is which of Newton's laws?
1st
2nd
3rd
4th
For every action there is an equal and opposite reaction is which of Newton's laws?
1st
2nd
3rd
4th
Forces that cause a change in motion of an object are called
balanced forces
net forces
motion forces
unbalanced forces
A book is at rest on a table. Check all the forces that act on it.
gravity
normal force
applied force
friction
A small child is pulling a wagon to the left, at a constant speed. Check all the forces that are acting on the wagon.
Gravity
Normal Force
Applied Force
Friction
The football is flying upward and to the right. Check all the forces that are acting on it.
Gravity
Normal
Applied
Friction
The hockey puck is sliding across perfectly smooth ice, at a constant speed. Check all the forces that are acting on it.
Gravity
Normal Force
Applied Force
Friction
The boy is pulling and the girl is pushing. The wagon is accelerating to the right. Click all the forces that act on the wagon.
Gravity
Normal
Applied
Friction
Mickey is climbing a rope. What forces are acting on him?
Gravity
Normal Force
Applied Force
Tension
A heavier object will fall to earth faster than a light object (if we ignore air resistance)
True
False
For the system of attached masses m1 & m2, which mass will have a higher acceleration?
m1
m2
Both will have same acceleration because they're attached by a string
In the figure below, on which side of the pulley will the string accelerate downward?
right side
left side
will not accelerate
Which of the following must be true if an object is accelerating?
It is going really fast.
It is moving away from the frame of reference point.
Balanced forces are acting upon it.
Unbalanced forces are acting upon it.
A student drops a ball onto the floor and it bounces. Which of the following statements about the interaction between the ball and the floor is correct?
The floor applies the same amount of force to the ball that the ball applies to the floor, which causes the ball to bounce.
The floor applies a larger amount of force to the ball than the ball applies to the floor, which causes the ball to bounce.
The floor applies a larger amount of force to the ball than the ball applies to the floor because it is a part of the Earth.
The ball applies a larger amount of force to the floor than the floor applies to the ball because the ball bounces.
Sami wants to build the fastest racing bike possible. What is one way he can change the bike, so she has a better chance of winning the race?
reduce the mass of the bike so it accelerates more quickly
put on smoother tires to eliminate friction with the race track
increase the mass of the bike to increase its gravitational field
replace metal parts with plastic to decreases its magnetic field
A table of position vs. time data for an object is shown below. Which of the following could be a possible force diagram for the object whose motion is described in the data table?
Which statement describes a situation where the acceleration is zero?
Only objects at rest experience an acceleration of zero.
Only objects moving at a constant speed in a positive direction experience an acceleration of zero.
Both objects at rest and objects moving at constant velocity experience an acceleration of zero.
Only objects moving at a constant speed in a negative direction experience an acceleration of zero.
Which of the following is a correct example of an interacting force pair as described by Newton’s third law?
A hammer applies a force on the nail it strikes, and the nail exerts an equal amount of force on the hammer.
Earth pulls down on the chair, and the ground pushes up on the chair with an equal amount of force.
A car drives down the road at a constant velocity, and the driver applies a force to the brake to stop the car.
A skydiver reaches constant velocity when the force of air resistance equals the force of gravity.
A student kicks a soccer ball in gym class. Which of the following is correct?
The student applies the same force to the ball that the ball applies to the student, and the ball accelerates.
The student applies a larger force to the ball than the ball applies to the student, and the ball accelerates.
The student applies a larger force to the ball than the ball applies to the student because the ball has less mass than the student.
The ball applies a larger force to the student than the student applies to the ball because the ball can move.
Which of the following must be true if an object is accelerating?
It must be slowing down.
It must be speeding up.
At least one unbalanced, external force must be acting on it.
Balanced forces are causing it to change its velocity.
A body at rest remains at rest, or, if in motion, remains in motion at a constant velocity unless acted on by a net external force. This statement is known as
Law of Inertia
Law of Acceleration
Law of Interaction
Law of Gravitation
Conservation of Energy
What is the net force for an object with a constant velocity of 10 m/s?
Zero
Less than 10 N but greater than 0
Greater than 10 N
10 N
Less than 0 N
The weight of an object can change when the object enters into a region with stronger or weaker gravity.
True
False
The mass of an object can change when the object enters into a region with stronger or weaker gravity.
True
False
A 60.0-kg sprinter starts a race with an acceleration of 5 m/s2. What is the net external force on him?
30 N
300 N
18 N
180 N
A 50 N of force was exerted by object A (10 kg) on object B (5 kg). How much force was exerted by object B on A based on the action force?
50 N
25 N
100 N
75 N
500 N
While watching Netflix, the laptop was at rest on top of a table. What force(s) is(are) present on the laptop?
None
Normal Force
Normal Force and Gravity
Gravity
Normal Force, Tension, and Gravity
What is The Second Law of Newton?
Inertia
F=ma
F1 = -F2
a = v/t
If object 1 is lighter than object 2 and they are both being pushed by THE SAME amount of force, which of the two will accelerate the most?
The lighter (object 1) because the object's inertia in comparison to the heavier is easier to overcome hence, making object 1 speed up more than object 2.
The heavier (object 2) because the more the inertia the more the object will accelerate
They don't accelerate because they travel at the same rate
They both have the same acceleration because the same amount of force is being exerted on the objects.
Which runner stopped for a rest?
Albert
Bob
Charlie
An object cannot change the state of rest or of motion,till a force is applied on it. This property is due to
its mass
its weight
its volume
its acceleration
Newton’s 3rd Law of motion states that any action will have a(n) ________and ______reaction
Equal and similar
Equal and different
Equal and opposite
Greater and opposite
If the person is pushing backwards with the paddle, why do they move forward?
The person will actually move backwards, they need to paddle the other way
The water pushes back with an equal and opposite force
The person is pushing harder than the water
The water pushes back with a greater force than the person
When the person pushes on the wall, and the wall pushes back, why does the person move and not the wall?
The wall has more mass
The person is pushing harder than the wall
The wall is pushing harder than the person
The skateboard is pushing on the person
When a small car pushes a big truck, the truck applies an equal and opposite force on the car.
False
True
When Ronda Rousey got kicked in the face, what are the action and reaction forces?
The foot pushing on face and face pushing on foot
Ronda Rousey and media criticism
The foot pushing on the air and air on foot
Ronda Rousey pushing on the floor and floor on Rhonda Rousey
What is Newton's 2nd Law?
Every action has an equal and opposite reaction
An object at rest stays at rest, an object in motion stays in motion.
F = ma
Friction
A baseball bat hits a baseball with a force of 100 Newtons. What is the force and its direction exerted by the ball on the bat?
100 Newtons, same direction
100 Newtons, opposite direction
200 Newtons, opposite direction
200 Newtons, same direction
When a heavy football player and a light one run into each other, who exerts more force
The light one
Their force are equal
The heavy one
Which of the following has the MOST momentum?
rolling ping-pong ball
rolling bowling ball
rolling soccer ball
rolling basketball
When a cannon fires a cannonball we observe Newton's third law. Which is the reaction force?
The cannon moving forward
The cannon moving backwards
The cannonball moving backwards
The cannonball moving forward
When a heavy football player and a light one run into each other, who exerts more force
The light one
Their force are equal
The heavy one
Force always come in________
waves
triplets
pairs
