Question 1

A car accelerates uniformly from rest to a speed of 20 m/s at the end of 1 min; it then accelerates uniformly to a speed of 40 m/s at the end of the next minute. During this 2-min period, the average speed of the car is

Accepted Answer

A)   7.5 m/s
B)   30 m/s
C)   15 m/s
D)   20 m/s
E)   40 m/s

Question 2

An object is at x = -3 m and has a velocity of 4 m/s. It is observed to be slowing down. Its acceleration is

Accepted Answer

A)   positive.
B)   negative.
C)   zero.
D)   negative until the object stops and then positive.
E)   impossible to determine based on the information provided.

Question 3

In which graph is the particle the farthest from the origin at t = 5 s?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5

Exam 2: Motion in One Dimension

In which graph is the particle the farthest from the origin at t = 5 s?

Correct Answer
verified

An object is at x = -3 m and has a velocity of 4 m/s. It is observed to be slowing down. Its acceleration is

Correct Answer
verified

A car accelerates uniformly from rest to a speed of 20 m/s at the end of 1 min; it then accelerates uniformly to a speed of 40 m/s at the end of the next minute. During this 2-min period, the average speed of the car is

Correct Answer
verified

Exam 2: Motion in One Dimension

In which graph is the particle the farthest from the origin at t = 5 s?

Correct AnswerverifiedShow Answer

An object is at x = -3 m and has a velocity of 4 m/s. It is observed to be slowing down. Its acceleration is

Correct AnswerverifiedShow Answer

A car accelerates uniformly from rest to a speed of 20 m/s at the end of 1 min; it then accelerates uniformly to a speed of 40 m/s at the end of the next minute. During this 2-min period, the average speed of the car is

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified