Physical Chemistry?

7. What is the unbalanced force that slows down a ball rolling across the floor?

A the force of friction
B the force of gravity
C the force of inertia
D the force of momentum

8. If two objects with different masses and traveling with different velocities collide, what law allows you to predict the motion of the objects after the collision?

A the law of conservation of momentum
B the law of universal gravitation
C Newton鈥檚 third law
D Newton鈥檚 second law

9. When gravitational forces and air resistance equalize on an object that is falling toward Earth and the object stops accelerating, what is the velocity of an object called?

A resultant velocity
B terminal velocity
C instantaneous velocity
D average velocity

11. Which object has the greatest inertia?

A a tennis ball
B a bowling ball
C a beach ball
D a volleyball

12. A seat belt helps you when your car stops suddenly by providing a(n)

A balanced forward force.
B unbalanced forward force.

C balanced backward force.
D unbalanced backward force.

7. A
8. A
9. B
11. B
12. D

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