# Chapter 12: Question Preview (ID: 5979)

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**The law that states that the unbalanced for acting on an object equals the object\'s mass times its acceleration is**

a) Newton\'s First Law of Motion

b) the law of conservation of momentum

c) Newton\'s Third Law of Motion

d) Newton\'s Second Law of Motion

**If 2 objects with different masses and trav eling with different velocities collide, what law allows you to predict the motion of the objects after the collision?**

a) Newton\'s Third Law of Motion

b) the law of universal gravitation

c) the law of conservation of momentum

d) Newton\'s Second Law of Motion

**Express the following as an equation. One newton is the force that can give an object with a mass of 1kg an acceleration of 1/m^2**

a) 1 N=1 kg / 1ms^2

b) 1 N=1ms^2 x 1 kg

c) 1 N=1ms^2 /1 kg

d) 1 N x 1 kg / = 1ms^2

**What happens immediately after a sky diver opens her parachute**

a) air resistance greatly increases

b) the foce of gravity greatly increases

c) the sky diver\'s speed increases

d) the sky diver is in a free fall

**Which statement illustrates Newton\'s first law?**

a) A stone will not move unless something pushes or pulls it

b) all of the answers are correct

c) As a car comes to a stop, the passangers continue to move forward

d) A ball rolling across the floor eventually slows down

**What unbalanced force is needed to give a 976 kg vehicle an acceleration of 2.50m/s^2**

a) 9.9 X 10^9 N

b) 9.9 X 10^9 lb

c) 2.44 X 10^9 N

d) 2.44 X 10^9 lb

**Which of the following objects exerts a gravitation force**

a) a bowling ball

b) a book

c) a feather

d) all of the answers are correct

**How much does a 59 kg woman weigh on Earth?**

a) 6.02 N

b) 59 lb

c) 145 lb

d) 578 N

**What is the momentum of a 255 g apple falling at 18 m/s**

a) 4.08 m/s^2 downward

b) 4.08 kg x m/s^2 downward

c) 15.9 m/s^2 downward

d) 15.9 kg x m/s^2 downward

**How does the total momentum of the two objects before a collision compare with the total momentum after the collision?**

a) It is the same

b) It is less

c) It is equal to zero

d) It is greater

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