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- 1. Multiple ChoiceNewton's third law states that any action will have a(n) _______ and ______ reactionEqual and similarEqual and oppositeEqual and differentGreater and opposite
- 2. Multiple Choice
A book rests on a table. The force of gravity pulls down on the book with a force of 20 newtons. What prevents the book from accelerating downward at 9.8 m/sec2
The table presses back up on the book with an equal and opposite force of 20 newtons.
The table presses back up on the book with a force greater than 20 newtons.
The table and the book together are accelerating downwards at 9.8 m/sec2
The inertia of the book holds it up
- 3. Multiple ChoiceYou hit a wall with a stick. The equal but opposite reaction is _____the wall pushes against youthe stick pushes against youyou push against the stickthe wall pushes against the stick
- 4. Multiple Choice
A person steps out of the boat and onto the dock. As the person moves forward onto the dock, the boat moves backward. Which statement best describes the backward motion of the boat as the person steps forward?For every action there is an equal and opposite reaction.Every mass exerts a force on every other mass.An object at rest tends to stay at rest.Friction opposes the motion of an object. - 5. Multiple ChoiceWhich best explains why we are able to accelerate forward when starting to run?As one leg moves backward, it provides an equal and opposite force for the other foot to move forward.No acceleration takes place. Runners are always at a fixed velocity.The striking foot pushes backward against the ground. The friction with the ground provides an equal and opposite force forward.The runner's upper body quickly leans forward, causing the entire body to begin accelerating forward
- 6. Multiple ChoiceWhen a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?The cannon moving forwardThe cannonball moving forwardThe cannon moving backwardThe cannonball moving backward
- 7. Multiple ChoiceHow much force is applied to Ben's hand if he hits the wall with a force of 1,000 N?500 N1,000 N2,000 NNot possible to determine.
- 8. Multiple ChoiceAccording to Newton's 3rd Law, an action and reaction are equal in____.sizeshapeweight
- 9. Multiple ChoiceRelating to Newton’s Third Law, action and reaction, what is the reaction when a rocket expels gas, smoke and flames from the nozzle end of the rocket engine?NothingPropels in the opposite directionCreates a balanced forceCreates friction
- 10. Multiple ChoiceWhat is the reaction force to a foot pushing down on the floor?The foot going through the floorThe floor pushing back against the footThe floor breaking to the foot
- 11. Multiple ChoiceAn archer shoots an arrow. The action force is the bowstring against the arrow, the reaction force is...Air resistance against the bowthe arrow's push against the bowstringthe grip of the archer's hand on the bow
- 12. Multiple ChoiceA rocket pushes exhaust 10, 000 N. Without any other forces acting on the rocket, how much force does the rocket go forward?15,000 N1,000 N10, 000 N
- 13. Multiple Choice
A swimmer pushes on the water and the water pushes on the hand and the swimmer moves forward. What is the ACTION force?
Swimmer pushes on the water
the water pushes on the hand and the swimmer moves forward
- 14. Multiple Choice
A swimmer pushes on the water and the water pushes on the hand and the swimmer moves forward. What is the REACTION force?
Swimmer pushes on the water
the water pushes on the hand and the swimmer moves forward
- 15. Multiple Choice
If you apply MORE force to the ground what happens to the force of the ground pushing on you?
The force remains the same
The force increases
The force decreases
- 16. Multiple Choice
If the gymnast decreases the force they exerts on the trampoline, what will the reaction be?
The gymnast will be pushed back by the trampoline with more force and go higher into the air
The gymnast will be pushed back by the trampoline with less force and not go as high into the air
No change will happen to the gymnast
- 17. Multiple Choice
The baseball player wants to hit a homerun. What does he have to do to the force he exert on the ball?
The baseball player will need to apply more force to the bat swinging at the ball
The baseball player will need to apply less force to the bat swinging at the ball
The baseball player should change nothing about his swing
- 18. Multiple Choice
The force exerted on the foot by a kicked soccer ball is the
gravitational force.
reaction force.
acceleration.
action force.
- 19. Multiple Choice
Which statement about action-reaction force pairs is incorrect?
They act on the same object.
They occur at the same time.
They always occur in pairs.
They are equal and opposite.
- 20. Multiple Choice
When a moving bowling ball hits a pin, some of the ball's momentum
doubles in force.
increases the pin's mass.
is lost.
is transferred to the pin.
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