Unit 2 Review - Newton's Laws

Which of Newton's Laws is the hardest to remember?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• All of them

If the mass of a moving object is doubled, its inertia would be:

• the same

• halved

• four times greater

• doubled

Which car has the smallest inertia?

• 1

• 2

• 3

• 4

In the cartoon above, a person is riding a bus without holding on to anything when the bus comes to a stop. What concept does this cartoon best illustrate?

• frames of reference

• inertia

• gravity

• acceleration

In Investigate 2.1, the ball is released from the point it is shown onto the curved track. Which of the descriptions below fit the balls motion? (Choose all that apply.)

• The ball will eventually stop on its own because of its inertia

• The ball will eventually stop because gravity slows it down

• The ball will continue rolling forever

• The ball will eventually stop because of friction

• The ball will travel back up to the original release height (recovered height)

Would you rather fight 10 duck-sized horses or 1 horse-sized duck?

• 10 duck-sized horses

• 1 horse-sized duck

A person is on a skateboard moving 3 m/s foward. They throw a baseball forward horizontally with a velocity of 5 m/s from the moving skateboard. Relative to the ground how fast is the baseball traveling?

• Not enough information.

• 2 m/s

• 3 m/s

• 5 m/s

• 8 m/s

Which of the following is an example of Newton's First Law of Motion?

• A feather and a brick are dropped from a ladder. The brick exerts a greater force when it hits the ground.

• Sam’s bike hits a curb and he flies over the handlebars, onto the grass.

• A person sits on a chair and pushes down, and the chair pushes upwards on the person.

A baseball pitcher throws a ball at 24 m/s. If the batter is 41 m from the pitcher, approximately how long does it take the ball to reach the batter?

• 0.59

• 0.75

• 1.7

• 2.3

An automobile accelerates at 15 m/s² . How much time is required for the automobile to reach a speed of 65 m/s, if it starts at 0 m/s?

• 0.23 s

• 4 s

• 15 s

• 50 s