Chapter 7: Laws of Motion and Momentum

Question 1

What does it mean if an object is in equilibrium?

Answer 1

stationary or moving at constant velocity

Question 2

What is Newton’s third law?

Answer 2

every action force has an equal and opposite reaction force

Question 3

What is Newton’s Second Law?

Answer 3

Resultant force is proportional to the rate of change of momentum of an object and in the same direction

Question 4

What is Newton’s First Law

Answer 4

Object at rest or moving with constant velocity will stay that way until acted upon by a resultant force

Question 5

What is the difference between elastic and inelastic collisions?

Answer 5

In an inelastic collision, Kinetic energy is not conserved before and after a collision

Question 6

momentum equation

Answer 6

mass x velocity

Question 7

True or False: Linear momentum is only conserved in elastic collisions

Answer 7

False
Linear momentum is always conserved

Question 8

What is the rate of change of momentum also known as

Answer 8

resultant force

Question 9

Impulse

Answer 9

change in momentum

Question 10

What does the area under a force-time graph represent?

Answer 10

Impulse

Question 11

Principle of conservation of energy

Answer 11

Energy cannot be created or destroyed, only transferred into another form

Question 12

Is momentum conserved in all collisions?

Answer 12

Yes