Vocabulary Matching

8th grade Energy, Force and Motion Quiz 4 (M)
Newton’s Laws of Motion / Name:
Date:
Each student should be able to….
8.6 (C) describe applications of Newton’s 3 Laws of Motion

Vocabulary Matching

1.______This is always equal and opposite to the action force

2. ______An object’s tendency to stay at rest or resist a change in motion

3. ______Any change in a object’s speed or direction

4. ______A push or a pull that changes an object’s motion

Identification

1.  For every ______there is an equal and opposite reaction.

2. Newton’s first law is also called the Law of ______because it says that objects resist changes in their motion.

3.  A rocket with less ______will have a greater acceleration during launch.

4.You need more ______to accelerate when you have a larger mass.

Multiple Choice

1.  Newton’s first law of motion, applied to a book sitting on a table, would explain that the book will not move until which of the following conditions is met?

a. Gravity on the book can be reduced to zero c. balanced forces act on the book
b. Unbalanced forces act on the book d. friction is exerted on the book

2.  The masses of four objects are given in this table. If all of the objects have the same acceleration, which will require the greatest force?

a.  Object 1

b.  Object 2

c.  Object 3

3.  According to Newton’s Third Law, if someone jumps off a skateboard, the skateboard will roll backwards because __

a.  The mass of the skateboard is the same as the mass of the person jumping off.

b.  The pull of gravity on the person is the same as on the skateboard.

c.  For the force that sent the person forward, there is an equal force pushing back on the skateboard.

4.  An object is moving to the right with a force of 20 N. What will happen if a force of 20 N starts acting on it in the opposite direction?

a.  The object’s velocity will increase.

b.  The object’s velocity will decrease.

c.  The object object will come to a stop.

5.  Safety belts protect people in cars in the event of an accident. Because of Newton’s Laws of Motion, when an impact causes the car to suddenly change its motion, if the people are not wearing a seat belt -

a.  The people in the car will continue to move in the same direction and at the same speed as before the impact.

b.  The people in the car will move backwards.

c.  The people in the car will come to a stop.

6.  What amount of force needs to be applied to a 20 kg bowling ball to give it an acceleration of 5 m/s2? (Force = mass x acceleration)

a.  4 Newtons b. 100 Newtons c. 25 Newtons