Practice Test

Question 1

What is the displacement of the object?

Revolt · Accepted Answer

B: 0 m

Question 2

What is the displacement of the object?

Revolt · Accepted Answer

B: 0 m

Question 3

Which best describes how to correct Hannah’s error?

Revolt · Accepted Answer

A: Describe the calculation for speed as “dividing distance by time.”

Question 4

What is the net force acting on the child?

Revolt · Accepted Answer

D: 0 cap n

Question 5

According to Newton’s second law of motion, the acceleration of an object is inversely proportional to which quantity?

Revolt · Accepted Answer

B: mass

Question 6

In the table, which force has the wrong direction?

Revolt · Accepted Answer

A: Kinetic friction

Question 7

What is the correct free body diagram of the broom?

Revolt · Accepted Answer

D: Image with description A free body diagram with 4 force vectors. The first vector is pointing downward, labeled F Subscript g Baseline. The second vector is pointing left, labeled F Subscript f Baseline. The third vector is pointing upward, labeled F Subscript N Baseline. The fourth vector is pointing down to the right, labeled F Subscript P Baseline. All vectors are the same length.

Question 8

Following an inelastic collision, what can kinetic energy be converted into? Choose three correct answers.

Revolt · Accepted Answer

A: momentum; C: sound; D: heat

Question 9

How does an airbag help protect a passenger in a car following a car accident?

Revolt · Accepted Answer

A: It shortens the passenger’s stopping time, and this decreases the force.; B: It increases the passenger’s stopping time, and this decreases the force.

Question 10

A lab cart with a mass of 15 kilograms is moving with constant velocity, v , along a straight horizontal track. A student drops a 2 kilograms mass into it from directly above, and the cart continues moving. Which equation best represents the horizontal momentum in this situation?

Revolt · Accepted Answer

C: 15 v sub i plus 2 times 0 is equal to open paren 15 plus 2 close paren times v sub f

Practice Test Answers

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