Test on Forces & Newton's Laws

A fish happily swims through the water due to the marvel of Newton's third law. Identify the action-reaction force pairs that are responsible for the fish's motion. A. The water pushes forward upon the fish's B. The fins of the fish push backward on the water C. The water moves backward and out of the way for the fish. D. The water pressure is greatest behind the fish than in front of it.

The water pushes forward upon the fish's The fins of the fish push backward on the water

Consider the following situation: "A book is at rest upon a table." Select all of the listed forces that are being exerted on the object. A. Gravity B. Normal C. Friction D. Tension E. Applied

Gravity, Normal

How much force is required to keep a 2-kg object moving to the right with a constant speed of 6.0 m/s? A. 0 m/s B. .33 m/s C. 3 m/s D. 12 m/s

0 m/s

How much force is required to keep a 3-kg object moving to the right with a constant speed of 6.0 m/s? A. 0 m/s B. .33 m/s C. 3 m/s D. 12 m/s

0 m/s

A rightward force of 24.0 N is applied to a 4.0 kg object to accelerate it to the right across a rough surface. The object accelerates at 2.0 m/s/s. How much friction does the object experience. A. 8 m/s/s B. 6 m/s/s C. 12 m/s/s D. 16 m/s/s

16 m/s/s

An object is moving to the left with a constant speed. What can be concluded about the forces acting upon the object? A. There is a leftward force, but no rightward force B. There are only vertical forces actin upon the object C. There is a stronger leftward force than the rightward force. D. All the individual forces acting upon the object are balanced.

All the individual forces acting upon the object are balanced.

Which two of the following statements correctly describe how acceleration depends upon net force and mass. Choose two answers. A. An object's acceleration is directly proportional to the net force it experiences. B. An object's acceleration is inversely proportional to the net force it experiences. C. An object's acceleration is directly proportional to the its mass C. An object's acceleration is inversely proportional to the its mass

An object's acceleration is directly proportional to the net force it experiences. An object's acceleration is inversely proportional to the its mass

Consider the following situation: "A large crate is being pushed across the floor at a constant velocity." Select all of the listed forces that are being exerted on the object. A. Gravity B. Normal C. Friction D. Tension E. Applied

Gravity, Normal, Friction, Applied

Consider the following situation: "A dog is being dragged by his dog chain across the ground at constant feed." Select all of the listed forces that are being exerted on the object. A. Gravity B. Normal C. Friction D. Tension E. Spring

Gravity, Normal, Tension, Friction

A large truck is at rest at a stoplight. A small car rear-ends the large truck. Why is the force experienced by the truck greater than the force experienced by the car? A. Truck has more mass B. Truck is at rest C. Nonsense! Car experiences greater force D. Nonsense! They both experienced the same amount of force

Nonsense! They both experienced the same amount of force

In an Olympic boxing match, Ricardo delivers a sharp blow to Sonny's forehead. The reaction force of Ricardo striking Sonny is _______. A. Ricardo's glove recoils B. Sonny fall backwards to the mat C. The force of the Earth pulling Sonny downwards

Ricardo's glove recoils

A sledder is moving to the right and speeding up. Which one of the following statements correctly describes the forces acting upon the sledder? A. Leftward forces are stronger than the rightward forces B. Rightward forces are stronger than the leftward forces C. Rightward forces are equal to the leftward forces

Rightward forces are stronger than the leftward forces

A sprinter in tract is able to progress towards the finish lien due to the marvels of Newton's third law. Identify the action-reaction force pairs that are responsible for the running motion. A. The ground pushes forward upon the sprinter's shoes B. The sprinter pushed backward upon the ground with her shoes C. The force of gravity pulls the sprinter to the surface of the track D. The ground pushes upward on the sprinter, reducing her weight.

The ground pushes forward upon the sprinter's shoes The sprinter pushed backward upon the ground with her shoes

An object is accelerating. What can be know for certain to be true of the object? A. The object is not experiencing any force. B. The individual forces acting upon the object are balanced C. There is a force acting in the direction of the object's motion. D. The individual forces that act upon the object are not balanced.

The individual forces that act upon the object are not balanced.

A rightward moving object is slowing down. Which of the following statements correctly describes the forces acting upon the object? A. The leftward force is stronger than the rightward force B. The rightward force is stronger than the leftward force C. The rightward force is equal to the leftward force.

The leftward force is stronger than the rightward force

The individual forces acting upon an object are balanced. What can be concluded about the object's motion? A. The object is not moving. B. The object is slowing down. C. The object is not accelerating.

The object is not accelerating

A large truck traveling at 40 mi/hr down Lake Avenue collides with a monarch butterfly that is crossing the road. How do the forces acting upon these two objects compare to one another? A. The truck experiences the greater force B. The butterfly experiences the greater force C. They both experience the same force.

They both experience the same force.

An object is moving along a level surface with a constant velocity. The net force acting upon the object is _________. A. Zero B. In the direction of motion C. Opposite the direction of motion D. None

Zero

An object has an acceleration of 12.0 m/s/s. The net force acting on the object is held constant. What will be the new acceleration. A. 3 m/s/s B. 4 m/s/s C. 15 m/s/s D. 36 m/s/s

36 m/s/s

Determine the net force (Fnet) on an object that experiences the following four forces: 40 N downward gravity 30 N upward normal force 20 N rightward app. force 20 N leftward friction force A. 0 N B. 10 N C. 50 N D. 100 N

0 N

Determine the net force (Fnet) on an object that experiences the following three forces: 40 N downward gravity 40 N upward normal force 15 N rightward app. force A. 0 N B. 25 N C. 95 N D. 15 N

15 N

A rightward force of 30.0 N is applies to a 5.0 kg object to accelerate it across a horizontal surface. The object encounters 20.0 N of friction. What is the object's acceleration? A. 2 m/s/s B. 4 m/s/s C. 10 m/s/s D. None

2 m/s/s

A rightward force of 18.0 N is applies to a 4.0 kg object to accelerate it across a rough surface. The object accelerates at 2.0 m/s/s. How much friction does the object experience? A. 12 m/s/s B. 6 m/s/s C. 4.5 m/s/s D. None

6 m/s/s

The force of gravity on objects on the moon is approximately one-sixth of the value on Earth. Joe weighs 600 N on Earth. Joe's mass on the moon will be aprox. ________. A. 60 kg B. 100 kg C. 1000 kg D. 60 N

60 kg

Which of the following can be explained using Newton's first law of motion? A. It explains why a stationary object remains stationary B. It explains why every force is accompanied by a reaction force. C. It explains why an object accelerates with a particular value.

A. It explains why a stationary object remains stationary

An eastward-moving object is changing its speed. The net force on the object _________. A. Must be zero B. Could be directed eastward or be zero C. Could be directed eastward or westward D. Must be directed westward.

Could be directed eastward or westward

When compared to a less massive object, a more massive object will always _________. A. Experience a greater unbalanced force B. Experience a smaller unbalanced force. C. Have a greater tendency to resist changes in its state of motion. D. Have a smaller tendency to resist changes in its state of motion

Have a greater tendency to resist changes in its state of motion.

An object experiences a rightward force of 5 N, a leftward force of 5 N, an upward force of 10 N, and a downward force of 10 N. Which one of the following conclusions can be made about the object's motion? A. It will accelerate B. If at rest, it will stay at rest C. If it is moving, then it will slow down. D. If it is moving, then it will speed up.

If at rest, it will stay at rest

A student is looking at a free-body diagram for an object. Which of the following statements describes how the student can determine if there is a net force? A. If there is an applied force, then there must be a net force. B. If there are less than four forces, then there must be a net force. C. If there is no friction acting upon the object, then there must be a net force. D. If oppositely-directed forces are unequal, then there must be a net force.

If oppositely-directed forces are unequal, then there must be a net force.

What property of an object describes its natural tendency to resist acceleration? A. Weight B. Unbalanced Force C. Inertia D. Shape

Inertia

Which of the following can be explained using Newton's third law of motion? A. It explains why a stationary object remains stationary B. It explains why every force is accompanied by a reaction force. C. It explains why an object accelerates with a particular value.

It explains why every force is accompanied by a reaction force.

An object experiences a rightward force of 5 N, a leftward force of 3 N, an upward force of 10 N and a downward force of 10. Which one of the following conclusions can be made about object's motion? A. It will accelerate. B. If it at rest, then it will stay at rest C. If it is moving, then it will slow down. D. If it is moving, then it will continue moving.

It will accelerate.

When all individual forces acting on an object are balanced, it is the natural tendency of an object to ________. A. Eventually stop. B. Accelerate C. Either stat at rest or come to a rest position D. Keep its velocity constant (either at zero or non-zero value)

Keep its velocity constant (either at zero or non-zero value)

Mac and Tosh are arguing in the cafeteria. Tosh says he flings the jello with a greater speed it will have a greater inertia. Mac argues that inertia does NOT depend upon speed, but rather upon mass. Who is correct? A. Mac B. Tosh C. Neither

Mac

When comparing Object A and Object B, it is observed that Object A has a greater tendency to resit changes in its state of motion. What does this observation indicate about Object A and Object B? A. Object A is acted upon by more force than Object B. B. Object A is a solid and Object B is a either a liquid or a gas C. Object A has more Inertia than Object B D. Object A experiences a lot more friction than Object B.

Object A has more inertia than Object B.

The following statements were made about a 10 kg object. Which one is CORRECT? A. The object weighs 98 N B. The object has a mass of 98 N C. The force of gravity on the object is 9.8 N

The object weighs 98 N

An elevator is supported by a cable and moving upward through the elevator shaft at a constant speed. How does the upward tension force compare to the downward force of gravity? A. The upward tension force is stronger than the downward force of gravity. B. The downward force of gravity is stronger than the upward tension force. C. The tension force and the force of gravity are of equal strength.

The tension force and the force of gravity are of equal strength.

Gravitational Forces on the moon are approximately one-sixth of the value on Earth. What is the mass and what is the weight on the moon of a 60 kg student? A. mass = 10 kg; weight = 600 N B. mass = 10 kg; weight = 100 N C. mass = 60 kg; weight = 10 N D. mass = 60 kg; weight = 100 N

mass = 60 kg; weight = 100 N