Lesson 4 Quiz

Question 1

A net force on an object will always change that object’s ________.

Answer 1

Momentum

Question 2

You are standing on an elevator and suddenly you notice your weight decrease. What do you conclude?

Answer 2

The elevator is accelerating downwards

Question 3

Suppose an object is moving in a straight line at 50km/h. According to Newton’s first law of motion, that object will:

Answer 3

Remain in motion unless a net force acts to stop it

Question 4

Newton’s second law tells us that the net force of an object equals its:

Answer 4

mass x acceleration

Question 5

Suppose that the sun were to collapse to about the radius of earth. What would we expect to happen as a result?

Answer 5

Due to the law of conservation of energy, the sun’s “lost” gravitational potential must appear elsewhere (such as in heat and light); meanwhile the law of conservation of angular momentum would cause the sun to spin much faster