Question 1

A car starts from rest and accelerates at a constant rate in a straight line.In the first second the car moves a distance of 2.0 meters.How much additional distance will the car move during the second second of its motion?

Accepted Answer

A) 2.0 m 
B) 4.0 m 
C) 6.0 m 
D) 8.0 m 
E) 13 m

Question 2

A brick is dropped from rest from a height of 4.9 m.How long does it take the brick to reach the ground?

Accepted Answer

A) 0.6 s 
B) 1.0 s 
C) 1.2 s 
D) 1.4 s 
E) 2.0 s

Question 3

2-15
The figure shows the speed as a function of time for an object in free fall near the surface of the earth.  The object was dropped from rest in a long evacuated cylinder.
-Which one of the following statements best explains why the graph goes through the origin?

Accepted Answer

A) The object was in a vacuum. 
B) The object was dropped from rest. 
C) The velocity of the object was constant. 
D) All v vs.t curves pass through the origin. 
E) The acceleration of the object was constant.

Question 4

In the process of delivering mail, a postal worker walks 161 m, due east from his truck.He then turns around and walks 194 m, due west from his truck.What is the worker's displacement relative to his truck?

Accepted Answer

A) 33 m, due west 
B) 33 m, due east 
C) 194 m, due west 
D) 252 m, due east 
E) 355 m, due west

Question 5

A ball is dropped from rest from a tower and strikes the ground 110 m below.Approximately how many seconds does it take the ball to strike the ground after being dropped? Neglect air resistance.

Accepted Answer

A) 2.50 s 
B) 3.50 s 
C) 4,74 s 
D) 12.5 s 
E) 16.0 s

Question 6

2-9
An object is moving along a straight line in the positive x direction.The graph shows its position from the starting point as a function of time.Various segments of the graph are identified by the letters A, B, C, and D. 
-What was the instantaneous velocity of the object at the end of the eighth second?

Accepted Answer

A) +7.5 m/s 
B) +0.94 m/s 
C) -0.94 m/s 
D) +1.1 m/s 
E) zero m/s

Question 7

2-9
An object is moving along a straight line in the positive x direction.The graph shows its position from the starting point as a function of time.Various segments of the graph are identified by the letters A, B, C, and D. 
-In a race, Marcos runs 1.00 mile in 4.02 min, mounts a bicycle, and rides back to his starting point, which is also the finish line, in 3.02 min.What is the magnitude of Marcos' average velocity for the race?

Accepted Answer

A) zero mi/h 
B) 12.1 mi/h 
C) 14.9 mi/h 
D) 17.0 mi/h 
E) 19.9 mi/h

Question 8

Alexa's hair grows with an average speed of 3.5 × 10-9 m/s.How long does it take her hair to grow 0.30 m? Note: 1 yr = 3.156 × 107 s.

Accepted Answer

A) 1.9 yr 
B) 1.3 yr 
C) 0.37 yr 
D) 5.4 yr 
E) 2.7 yr

Question 9

A car travels in a straight line covering a total distance of 90.0 miles in 60.0 minutes.Which one of the following statements concerning this situation is necessarily true?

Accepted Answer

A) The velocity of the car is constant. 
B) The acceleration of the car must be non-zero. 
C) The first 45 miles must have been covered in 30.0 minutes. 
D) The speed of the car must be 90.0 miles per hour throughout the entire trip. 
E) The average velocity of the car is 90.0 miles per hour in the direction of motion.

Question 10

A train with a constant speed of 16 m/s passes through a town.After leaving the town, the train accelerates at 0.33 m/s2 until it reaches a speed of 35 m/s.How far did the train travel while it was accelerating?

Accepted Answer

A) 0.029 km 
B) 0.53 km 
C) 1.5 km 
D) 2.3 km 
E) 3.0 km

Question 11

2-10
A automotive test driver travels due north in a prototype hybrid vehicle at 30 mi/h for 2 hours.She then reverses her direction and travels due south at 60 mi/h for 1 hour.
-What is the average speed of the vehicle?

Accepted Answer

A) zero mi/h 
B) 30 mi/h 
C) 40 mi/h 
D) 50 mi/h 
E) 60 mi/h

Question 12

2-5
A tennis ball is shot vertically upward in an evacuated chamber inside a tower with an initial speed of 20.0 m/s at time t = 0 s.
-How high does the ball rise?

Accepted Answer

A) 10.2 m 
B) 20.4 m 
C) 40.8 m 
D) 72.4 m 
E) 98.0 m

Question 13

2-8
An object is moving along a straight line.The graph shows the object's velocity as a function of time. 
-During which interval(s) of the graph does the speed of the object increase by equal amounts in equal times?

Accepted Answer

A) 0 s to 2 s 
B) 2 s to 3 s 
C) 3 s to 5 s 
D) 0 s to 2 s and 3 s to 5 s 
E) 0 s to 2 s, 3 to 5 s, and 5 to 6 s

Question 14

A cheetah is walking at a speed of 1.15 m/s when it observes a gazelle 43.0 m directly ahead.If the cheetah accelerates at 9.25 m/s2, how long does it take the cheetah to reach the gazelle if the gazelle doesn't move?

Accepted Answer

A) 4.29 s 
B) 3.67 s 
C) 3.05 s 
D) 1.94 s 
E) 2.93 s

Question 15

At which time or times does the object reverse its direction of motion?

Accepted Answer

A) 1 s and 2 s 
B) 2 s and 5 s 
C) 1 s 
D) 2 s 
E) 5 s

Question 16

2-9
An object is moving along a straight line in the positive x direction.The graph shows its position from the starting point as a function of time.Various segments of the graph are identified by the letters A, B, C, and D. 
-The rate at which the acceleration of an object changes with time is called a jerk.What is the dimension of the jerk?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 17

In which segment or segments of the graph does the object have the highest speed?

Accepted Answer

A) AB 
B) BC 
C) CD 
D) DE 
E) AB and CD

Question 18

What is the magnitude of the acceleration of the ball when it is at its highest point?

Accepted Answer

A) zero m/s2 
B) 9.80 m/s2 
C) 19.6 m/s2 
D) 4.90 m/s2 
E) 3.13 m/s2

Question 19

Water drips from rest from a leaf that is 15 meters above the ground.Neglecting air resistance, what is the speed of each water drop when it hits the ground?

Accepted Answer

A) 30 m/s 
B) 17 m/s 
C) 40 m/s 
D) 15 m/s 
E) 20 m/s

Question 20

A car, starting from rest, accelerates in a straight-line path at a constant rate of 2.0 m/s2. How far will the car travel in 12 seconds?

Accepted Answer

A) 180 m 
B) 144 m 
C) 6 m 
D) 24 m 
E) 288 m

Exam 2: Kinematics in One Dimension

A car starts from rest and accelerates at a constant rate in a straight line.In the first second the car moves a distance of 2.0 meters.How much additional distance will the car move during the second second of its motion?

A brick is dropped from rest from a height of 4.9 m.How long does it take the brick to reach the ground?

2-15 The figure shows the speed as a function of time for an object in free fall near the surface of the earth. The object was dropped from rest in a long evacuated cylinder. -Which one of the following statements best explains why the graph goes through the origin?

In the process of delivering mail, a postal worker walks 161 m, due east from his truck.He then turns around and walks 194 m, due west from his truck.What is the worker's displacement relative to his truck?

A ball is dropped from rest from a tower and strikes the ground 110 m below.Approximately how many seconds does it take the ball to strike the ground after being dropped? Neglect air resistance.

Alexa's hair grows with an average speed of 3.5 × 10^-⁹m/s.How long does it take her hair to grow 0.30 m? Note: 1 yr = 3.156 × 10⁷s.

A car travels in a straight line covering a total distance of 90.0 miles in 60.0 minutes.Which one of the following statements concerning this situation is necessarily true?

A train with a constant speed of 16 m/s passes through a town.After leaving the town, the train accelerates at 0.33 m/s² until it reaches a speed of 35 m/s.How far did the train travel while it was accelerating?

2-10 A automotive test driver travels due north in a prototype hybrid vehicle at 30 mi/h for 2 hours.She then reverses her direction and travels due south at 60 mi/h for 1 hour. -What is the average speed of the vehicle?

2-5 A tennis ball is shot vertically upward in an evacuated chamber inside a tower with an initial speed of 20.0 m/s at time t = 0 s. -How high does the ball rise?

2-8 An object is moving along a straight line.The graph shows the object's velocity as a function of time. -During which interval(s) of the graph does the speed of the object increase by equal amounts in equal times?

A cheetah is walking at a speed of 1.15 m/s when it observes a gazelle 43.0 m directly ahead.If the cheetah accelerates at 9.25 m/s², how long does it take the cheetah to reach the gazelle if the gazelle doesn't move?

At which time or times does the object reverse its direction of motion?

In which segment or segments of the graph does the object have the highest speed?

What is the magnitude of the acceleration of the ball when it is at its highest point?

Water drips from rest from a leaf that is 15 meters above the ground.Neglecting air resistance, what is the speed of each water drop when it hits the ground?

A car, starting from rest, accelerates in a straight-line path at a constant rate of 2.0 m/s². How far will the car travel in 12 seconds?