Question 1

The average speed of a horse that gallops 10 kilometers in 30 minutes is

Accepted Answer

A) 15 km/h. 
B) 20 km/h. 
C) 30 km/h. 
D) 40 km/h. 
A) 15 km/h. 
B) 20 km/h. 
C) 30 km/h. 
D) 40 km/h.

Question 2

Twelve seconds after starting from rest, a freely-falling cantelope has a speed of

Accepted Answer

A) 10 m/s. 
B) 50 m/s. 
C) 100 m/s. 
D) more than 100 m/s. 
A) 10 m/s. 
B) 50 m/s. 
C) 100 m/s. 
D) more than 100 m/s.

Question 3

Neglecting air resistance, a bullet fired straight down from the top of a high cliff has an acceleration of

Accepted Answer

A) less than 10 m/s2. 
B) 10 m/s2. 
C) more than 10 m/s2. 
D) depends on the height of the cliff. 
A) less than 10 m/s2. 
B) 10 m/s2. 
C) more than 10 m/s2. 
D) depends on the height of the cliff.

Question 4

An object covers a distance of 8 meters in the first second of travel, another 8 meters during the next second, and 8 meters again during the third second. Its acceleration is

Accepted Answer

A) 0 m/s2. 
B) 5 m/s2. 
C) 8 m/s2. 
D) 24 m/s2. 
A) 0 m/s2. 
B) 5 m/s2. 
C) 8 m/s2. 
D) 24 m/s2.

Question 5

Jogging Jake runs at 4 m/s along a train flatcar that moves at 10 m/s in the same direction. Jake's speed relative to the ground is

Accepted Answer

A) 6 m/s. 
B) 10 m/s. 
C) 14 m/s. 
D) none of the above 
A) 6 m/s. 
B) 10 m/s. 
C) 14 m/s. 
D) none of the above

Question 6

A bullet is dropped into a river from a very high bridge at the same time as another bullet is fired straight downward from a rifle. Neglecting air resistance, the acceleration just before striking the water is

Accepted Answer

A) greater for the dropped bullet. 
B) greater for the fired bullet. 
C) the same for each bullet. 
D) none of the above 
A) greater for the dropped bullet. 
B) greater for the fired bullet. 
C) the same for each bullet. 
D) none of the above

Question 7

You're at rest in a hammock when a hungry mosquito sees an opportunity for lunch. A mild 2-m/s breeze is blowing. If the mosquito joins you for lunch it should hover over you by flying

Accepted Answer

A) against the breeze at 2 m/s. 
B) with the breeze at 2 m/s. 
C) a bit faster than wind speed. 
D) none of the above 
A) against the breeze at 2 m/s. 
B) with the breeze at 2 m/s. 
C) a bit faster than wind speed. 
D) none of the above

Question 8

The distance a freely falling bowling ball falls each second

Accepted Answer

A) is about 5 m. 
B) is about 10 m. 
C) increases. 
D) none of the above 
A) is about 5 m. 
B) is about 10 m. 
C) increases. 
D) none of the above

Question 9

Ten seconds after starting from rest, a car is moving at 40 m/s. What is the car's acceleration?

Accepted Answer

A) 0.25 m/s2 
B) 2.8 m/s2 
C) 4.0 m/s2 
D) 10 m/s2 
E) 40 m/s2 
A) 0.25 m/s2 
B) 2.8 m/s2 
C) 4.0 m/s2 
D) 10 m/s2 
E) 40 m/s2

Question 10

As water drops fall at a steady rate from a leaking faucet they

Accepted Answer

A) get closer together. 
B) get farther apart. 
C) remain at a relatively fixed distance from one another. 
A) get closer together. 
B) get farther apart. 
C) remain at a relatively fixed distance from one another.

Question 11

What is the acceleration of a car that starts from rest and 5 seconds later reaches a speed of 20 m/s?

Accepted Answer

A) 1 m/s2 
B) 2 m/s2 
C) 3 m/s2 
D) 4 m/s2 
E) 5 m/s2 
A) 1 m/s2 
B) 2 m/s2 
C) 3 m/s2 
D) 4 m/s2 
E) 5 m/s2

Question 12

A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always

Accepted Answer

A) in the direction of motion. 
B) opposite its velocity. 
C) directed upward. 
D) directed downward. 
E) none of the above 
A) in the direction of motion. 
B) opposite its velocity. 
C) directed upward. 
D) directed downward. 
E) none of the above

Question 13

A rock dropped from a 5-m height accelerates at 10 m/s2 and strikes the ground 1 s later. If the rock is dropped from a height of 2.5 m, its acceleration of fall is

Accepted Answer

A) half. 
B) the same. 
C) twice. 
D) four times as much. 
A) half. 
B) the same. 
C) twice. 
D) four times as much.

Question 14

The vertical height attained by a basketball player who achieves a hang time of a full 1 s is about

Accepted Answer

A) 0.8 m. 
B) 1 m. 
C) 1.2 m. 
D) 2.5 m. 
E) more than 2.5 m. 
A) 0.8 m. 
B) 1 m. 
C) 1.2 m. 
D) 2.5 m. 
E) more than 2.5 m.

Question 15

A seagull flying at 10 km/h in a 10-km/h crosswind has a resultant speed of

Accepted Answer

A) 10 km/h. 
B) about 14 km/h. 
C) 20 km/h. 
D) more than 20 km/h. 
A) 10 km/h. 
B) about 14 km/h. 
C) 20 km/h. 
D) more than 20 km/h.

Question 16

A ball rolls along a horizontal track in a certain time. If the track has a small upward dent in it, the time to roll the length of the track will be

Accepted Answer

A) less. 
B) the same. 
C) more. 
A) less. 
B) the same. 
C) more.

Question 17

A ball starting from rest at the top of an inclined plane accelerates at 2 m/s2 and reaches the bottom of the plane in 3 seconds. What is the length of the plane?

Accepted Answer

A) 2 m 
B) 3 m 
C) 5 m 
D) 9 m 
A) 2 m 
B) 3 m 
C) 5 m 
D) 9 m

Question 18

An airplane that flies at 100 km/h in a 100-km/h crosswind has a ground speed of

Accepted Answer

A) 0 km/h. 
B) 100 km/h. 
C) 141 km/h. 
D) 200 km/h. 
A) 0 km/h. 
B) 100 km/h. 
C) 141 km/h. 
D) 200 km/h.

Question 19

The distance a freely falling object falls from rest in one-half second is

Accepted Answer

A) 2 m. 
B) 4 m. 
C) 6 m. 
D) none of the above 
A) 2 m. 
B) 4 m. 
C) 6 m. 
D) none of the above

Question 20

At one instant a heavy object in air is moving upward at 50 m/s. One second later its speed is approximately

Accepted Answer

A) 40 m/s. 
B) 50 m/s. 
C) 55 m/s. 
D) 60 m/s. 
A) 40 m/s. 
B) 50 m/s. 
C) 55 m/s. 
D) 60 m/s.

Exam 3: Linear Motion

The average speed of a horse that gallops 10 kilometers in 30 minutes is

Twelve seconds after starting from rest, a freely-falling cantelope has a speed of

Neglecting air resistance, a bullet fired straight down from the top of a high cliff has an acceleration of

An object covers a distance of 8 meters in the first second of travel, another 8 meters during the next second, and 8 meters again during the third second. Its acceleration is

Jogging Jake runs at 4 m/s along a train flatcar that moves at 10 m/s in the same direction. Jake's speed relative to the ground is

A bullet is dropped into a river from a very high bridge at the same time as another bullet is fired straight downward from a rifle. Neglecting air resistance, the acceleration just before striking the water is

You're at rest in a hammock when a hungry mosquito sees an opportunity for lunch. A mild 2-m/s breeze is blowing. If the mosquito joins you for lunch it should hover over you by flying

The distance a freely falling bowling ball falls each second

Ten seconds after starting from rest, a car is moving at 40 m/s. What is the car's acceleration?

As water drops fall at a steady rate from a leaking faucet they

What is the acceleration of a car that starts from rest and 5 seconds later reaches a speed of 20 m/s?

A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always

A rock dropped from a 5-m height accelerates at 10 m/s2 and strikes the ground 1 s later. If the rock is dropped from a height of 2.5 m, its acceleration of fall is

The vertical height attained by a basketball player who achieves a hang time of a full 1 s is about

A seagull flying at 10 km/h in a 10-km/h crosswind has a resultant speed of

A ball rolls along a horizontal track in a certain time. If the track has a small upward dent in it, the time to roll the length of the track will be

A ball starting from rest at the top of an inclined plane accelerates at 2 m/s2 and reaches the bottom of the plane in 3 seconds. What is the length of the plane?

An airplane that flies at 100 km/h in a 100-km/h crosswind has a ground speed of

The distance a freely falling object falls from rest in one-half second is

At one instant a heavy object in air is moving upward at 50 m/s. One second later its speed is approximately

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A rock dropped from a 5-m height accelerates at 10 m/s² and strikes the ground 1 s later. If the rock is dropped from a height of 2.5 m, its acceleration of fall is

A ball starting from rest at the top of an inclined plane accelerates at 2 m/s² and reaches the bottom of the plane in 3 seconds. What is the length of the plane?