Chapter 5: Newton's Third Law Of Motion, Action And Reaction

22 Questions | By Drtaylor | Updated: Mar 21, 2022 | Attempts: 877

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1.

For an action force, there must be a reaction force that
- A.
  
  Always acts in the same direction
- B.
  
  Is slightly smaller in magnitude than the action force
- C.
  
  Is slightly larger in amplitude than the action force
- D.
  
  Is exactly equal in magnitude
2.

An archer shoots an arrow. Consider the action force to be the bowstring against the arrow. The reaction to this force is the
- A.
  
  Combined weight of the arrow and bowstring
- B.
  
  Air resistance against the bow
- C.
  
  Friction of the ground against the archer's feet
- D.
  
  Grip of the archer's hand on the bow
- E.
  
  Arrow's push against the bowstring
3.

A player catches a ball. Consider the action force to be the impact of the ball against the player's glove. The reaction to this force is the
- A.
  
  Player's grip on the glove
- B.
  
  Force the glove exerts on the ball
- C.
  
  Friction of the ground against the player's shoes
- D.
  
  Muscular effort in the player's arms
- E.
  
  None of these
4.

A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction to this force is the
- A.
  
  Air resistance on the ball
- B.
  
  Weight of the ball
- C.
  
  Force that the ball exerts on the bat
- D.
  
  Grip of the player's hand against the ball
- E.
  
  Weight of the bat
5.

A baseball player bats a ball with a force of 1000 N. The reaction force that the ball exerts against the bat is
- A.
  
  Less than 1000 N
- B.
  
  More than 1000 N
- C.
  
  1000 N
- D.
  
  Impossible to determine
6.

As a ball falls, the action force is the pull of Earth on the ball. The reaction force is the
- A.
  
  Air resistance acting against the ball
- B.
  
  Acceleration of the ball
- C.
  
  Pull of the ball's mass on the Earth
- D.
  
  None of these
7.

A person is attracted toward the center of Earth by a 500-N gravitational force. The Earth is attracted toward the person with a force of
- A.
  
  Zero
- B.
  
  250 N
- C.
  
  500 N
- D.
  
  1000 N
8.

A karate chop delivers a blow of 3000 N to a board that breaks. The force that acts on the hand during this event is
- A.
  
  Zero
- B.
  
  1500 N
- C.
  
  3000 N
- D.
  
  6000 N
9.

Arnold Strongman and Suzie Small each pull very hard on opposite ends of a massless rope in a tug-of-war. The greater force on the rope is exerted by
- A.
  
  Arnold, of course
- B.
  
  Suzie, surprisingly
- C.
  
  Both the same, interestingly enough
10.

Earth pulls on the moon. Similarly the moon pulls on Earth, evidence that
- A.
  
  These two pulls comprise an action-reaction pair
- B.
  
  Earth is larger so its pull is larger
- C.
  
  The moon is smaller so its pull is smaller
- D.
  
  Larger objects pull harder
11.

The attraction of a person's body toward Earth is called weight. The reaction to this force is
- A.
  
  The person's body pushing against Earth's surface
- B.
  
  The Earth's surface pushing against the person's body
- C.
  
  The person's body pulling on the Earth
- D.
  
  None of these
12.

A skydiver falls towards the Earth. The attraction of the Earth on the diver pulls the diver down. What is the reaction to this force?
- A.
  
  Air resistance the diver encounters while falling
- B.
  
  Water resistance that will soon act upward on the diver
- C.
  
  The attraction to the planets, stars, and every particle in the universe
- D.
  
  All of these
- E.
  
  None of these
13.

A automobile and a baby carriage traveling at the same speed collide head-on. The impact force is
- A.
  
  Greater on the automobile
- B.
  
  Greater on the baby carriage
- C.
  
  The same for both
14.

A Mack truck and a Volkswagen traveling at the same speed have a head-on collision. The vehicle that undergoes the greatest change in velocity will be the
- A.
  
  Volkswagen
- B.
  
  Mack truck
- C.
  
  Same for both
15.

A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is
- A.
  
  Greater on the bug
- B.
  
  Greater on the car
- C.
  
  The same for both
16.

Your friend says that the heavyweight champion of the world cannot exert a force of 50 N on a piece of tissue paper with his best punch. The tissue paper is held in midair – no wall, no tricks. You
- A.
  
  Agree that it can't be done
- B.
  
  Have reservations about this assertion
- C.
  
  Disagree, for a good punch easily delivers this much force
17.

A piece of rope is pulled by two people in a tug-of-war. Each pulls with 400 N of force. What is the tension in the rope?
- A.
  
  Zero
- B.
  
  400 N
- C.
  
  600 N
- D.
  
  800 N
- E.
  
  None of these
18.

Two people, one twice as massive as the other, attempt a tug-of-war with 12 meters of massless rope on frictionless ice. After a brief time, they meet. The heavier person slides a distance of
- A.
  
  3 m
- B.
  
  4 m
- C.
  
  6 m
- D.
  
  0 m
19.

A bird sitting on the limb of a tree is moving about 30 km/s with respect to the sun. If the bird takes 1 second to drop down to a worm below, the worm would be 30 km downrange from the bird when it reached the ground. This faulty reasoning is best countered with Newton's
- A.
  
  First law
- B.
  
  Second law
- C.
  
  Third law
- D.
  
  Law of gravitation
- E.
  
  None of these
20.

The force exerted on the tires of a car to directly accelerate it along a road is exerted by the
- A.
  
  Engine
- B.
  
  Tires
- C.
  
  Air
- D.
  
  Road
- E.
  
  None of these
21.

A vehicle that weighs 4000 N on the surface of the Earth is travelling in outer space at a speed of 200 m/s. The smallest constant force that must be applied to stop it in 20 seconds is
- A.
  
  20 N
- B.
  
  40 N
- C.
  
  400 N
- D.
  
  4000 N
- E.
  
  More than 4000 N
22.

A vehicle that weights 400 N on the surface of the Earth is traveling in outer space at a speed of 400 m/s . It can be stopped by applying a constant force of 20 N for
- A.
  
  2 seconds
- B.
  
  4 seconds
- C.
  
  80 seconds
- D.
  
  400 seconds
- E.
  
  800 seconds