Chapter 2: Newton’s First Law of Motion-Inertia

Question 1

Whereas Aristotle relied on logic in explaining nature, Galileo relied on

Answer 1

experiment.

Question 2

The scientist to first introduce the concept of inertia was

Answer 2

Galileo.

Question 3

Galileo discredited Aristotle’s interpretation of motion using: a) the motions of planets around the Sun; b) the acceleration of free fall; c) the role of push and pull in describing motion;

Answer 3

b) the acceleration of free fall

Question 4

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrates that

Answer 4

the milk carton has inertia.

Question 5

An object in mechanical equilibrium is an object: a) moving with constant velocity; b) at rest; c) having no acceleration; d) all of these.

Answer 5

d) all of these.

Question 6

When you stand at rest on a pair of bathroom scales, the readings on the scales will always

Answer 6

add up to your total weight.

Question 7

When you hang from a pair of gym rings, the upward support forces on the rings will always

Answer 7

add up to your weight.

Question 8

A man weighing 800 N stands at rest on two bathroom scales so that his weight is distributed evenly over both scales. The reading on each scale is

Answer 8

400 N

Question 9

The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is

Answer 9

10 N

Question 10

A 300-kg bear grasping a vertical tree is stationary. The friction force between the tree and the bear is

Answer 10

3000 N