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Chapter 12 Review 3

Test Description: Newton's laws of motion

Instructions: Answer all questions to get your test result.

1) What is the momentum of a 60 kg ice skater gliding across the ice at a speed of 2 m/s

A240 kgxm/s B30 kg/ m/s C60 kg D120 kgxm/s

2) The gravitational force between two objects increases as mass

Adecreases or distance increases Bincreases or distance decreases Cincreases or distance increases Ddecreases or distance decreases

3) The mass of a newborn baby is 3.9 kg. What is the baby's weight?

A38.2 N B23 N C3.9 N D9.8 N

4) A 36 kg canoe broke free of its dock and is now floating downriver at a speed of 2.9 m/s. What is the canoe's momentum?

A104.4 kgxm/s B145 kgxm/s C38.2 kgxm/s D9.8 kgxm/s

5) What happens to the magnitude of the fluid friction acting on a submarine as the submarine's speed increases?

ANot enough information to tell BIt Increases CIt decreases DIt does not change

6) Why don't action-reaction forces cancel each other out

Athe reaction force is larger Bthe action force is larger Cthey do cancel each other out DAct on different objects

7) What law states that if no net force acts on a system, then the total momentum of the system does not change?

AThe law of conservation of momentum BNewton's third law CNewton's first law DNewton's second law

8) If three balls are released at the same time from the same height, which one will hit the ground first?

AThe will each hit at the same time BBall 1 CBall 3 DBall 2

9) How are the size and direction of action-reaction forces related?

AOpposite in size, equal in direction BEqual in size, equal in direction CEqual in size, opposite in direction DOpposite in size, Opposite in direction

10) How can you double the acceleration of an object if you cannot alter the object's mass?

ACut the mass in half BCut the force in half CDouble the force DDouble the mass

*select an answer for all questions

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