Question 1

A car accelerates from rest for 5 seconds until it reaches a speed of 20 m/s.What is the car's acceleration in meters per second per second?

Accepted Answer

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

Question 2

Drop a rock from a 5-m height and it accelerates at 10 m/s2 and strikes the ground 1 s later.Drop the same rock from a height of 2.5 m and its acceleration of fall is about

Accepted Answer

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

Question 3

One half second after starting from rest,a freely falling object will have a speed of about

Accepted Answer

A) 20 m/s. 
B) 10 m/s. 
C) 5 m/s. 
D) 2)5 m/s. 
E) none of these 
A) 20 m/s. 
B) 10 m/s. 
C) 5 m/s. 
D) 2)5 m/s. 
E) none of these C

Question 4

A man leans over the edge of a cliff and throws a rock upward at 4.9 m/s.How far below the level from which it was thrown is the rock 2 seconds later?

Accepted Answer

A) 4)9 m 
B) 9)8 m 
C) 14.7 m 
D) 19.6 m 
A) 4)9 m 
B) 9)8 m 
C) 14.7 m 
D) 19.6 m

Question 5

If a freely falling object were somehow equipped with a speedometer,its speed reading would increase each second by about

Accepted Answer

A) 5 m/s. 
B) 10 m/s. 
C) 15 m/s. 
D) a variable amount. 
E) depends on its initial speed 
A) 5 m/s. 
B) 10 m/s. 
C) 15 m/s. 
D) a variable amount. 
E) depends on its initial speed

Question 6

A bullet is fired straight down from the top of a high cliff.Neglecting air resistance,the acceleration of the bullet in meters per second per second

Accepted Answer

A) is less than 9.8. 
B) is 9.8. 
C) is more than 9.8. 
D) depends on the height of the cliff. 
A) is less than 9.8. 
B) is 9.8. 
C) is more than 9.8. 
D) depends on the height of the cliff.

Question 7

An object falls freely from rest on a planet where the acceleration due to gravity is twice as much as it is on Earth.In the first 5 seconds it falls a distance of

Accepted Answer

A) 100 m. 
B) 150 m. 
C) 250 m. 
D) 500 m. 
E) none of these 
A) 100 m. 
B) 150 m. 
C) 250 m. 
D) 500 m. 
E) none of these

Question 8

A horse gallops a distance of 10 kilometers in a time of 30 minutes.Its average speed 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 9

A hockey puck is set in motion across a frozen pond.If ice friction and air resistance are neglected,the force required to keep the puck sliding at constant velocity is

Accepted Answer

A) zero. 
B) equal to its weight. 
C) equal to its weight divided by its mass. 
D) equal to the product of its mass times its weight. 
A) zero. 
B) equal to its weight. 
C) equal to its weight divided by its mass. 
D) equal to the product of its mass times its weight.

Question 10

At one instant a heavy object in air is moving upward at 50 meters per second.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.

Question 11

If a rocket initially at rest accelerates at a rate of 50 m/s2 for one minute,its speed will be

Accepted Answer

A) 50 m/s. 
B) 500 m/s. 
C) 3000 m/s. 
D) 3600 m/s. 
A) 50 m/s. 
B) 500 m/s. 
C) 3000 m/s. 
D) 3600 m/s.

Question 12

A car maintains a constant velocity of 100 km/hr for 10 seconds.During this interval its acceleration is

Accepted Answer

A) zero. 
B) 10 km/hr. 
C) 110 km/hr. 
D) 1000 km/hr. 
A) zero. 
B) 10 km/hr. 
C) 110 km/hr. 
D) 1000 km/hr.

Question 13

If a car increases its velocity from zero to 60 km/h in 10 seconds,its acceleration is

Accepted Answer

A) 3 km/h/s. 
B) 6 km/h/s. 
C) 10 km/h/s. 
D) 60 km/h/s. 
E) 600 km/h/s. 
A) 3 km/h/s. 
B) 6 km/h/s. 
C) 10 km/h/s. 
D) 60 km/h/s. 
E) 600 km/h/s.

Question 14

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

Accepted Answer

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

Question 15

When a rock thrown straight upwards gets to the exact top of its path,its

Accepted Answer

A) velocity is zero and its acceleration is zero. 
B) velocity is zero and its acceleration is about 10 meters per second per second. 
C) velocity is about 10 m/s and its acceleration is zero. 
D) velocity is about 10 m/s and its acceleration is about 10 meters per second per second. 
E) none of these 
A) velocity is zero and its acceleration is zero. 
B) velocity is zero and its acceleration is about 10 meters per second per second. 
C) velocity is about 10 m/s and its acceleration is zero. 
D) velocity is about 10 m/s and its acceleration is about 10 meters per second per second. 
E) none of these

Question 16

Starting from rest,the distance a freely falling object will fall in 0.5 second is about

Accepted Answer

A) 1 m. 
B) 10 m. 
C) 1)00 m. 
D) none of the above 
A) 1 m. 
B) 10 m. 
C) 1)00 m. 
D) none of the above

Question 17

If an object falling freely were somehow equipped with an odometer to measure the distance it travels,then the amount of distance it travels each succeeding second would be

Accepted Answer

A) constant. 
B) less and less each second. 
C) greater than the second before. 
D) doubled. 
A) constant. 
B) less and less each second. 
C) greater than the second before. 
D) doubled.

Question 18

While an object near the Earth's surface is in free fall,its

Accepted Answer

A) velocity increases. 
B) acceleration increases. 
C) mass increases. 
D) mass decreases. 
A) velocity increases. 
B) acceleration increases. 
C) mass increases. 
D) mass decreases.

Question 19

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

Accepted Answer

A) 0)25 
B) 2)8 
C) 4)0 
D) 10 
E) 40 
A) 0)25 
B) 2)8 
C) 4)0 
D) 10 
E) 40

Question 20

The two measurements necessary for calculating average speed are

Accepted Answer

A) acceleration and time. 
B) velocity and time. 
C) distance and time. 
D) distance and acceleration. 
E) velocity and distance. 
A) acceleration and time. 
B) velocity and time. 
C) distance and time. 
D) distance and acceleration. 
E) velocity and distance.

Exam 3: Linear Motion

A car accelerates from rest for 5 seconds until it reaches a speed of 20 m/s.What is the car's acceleration in meters per second per second?

Drop a rock from a 5-m height and it accelerates at 10 m/s2 and strikes the ground 1 s later.Drop the same rock from a height of 2.5 m and its acceleration of fall is about

One half second after starting from rest,a freely falling object will have a speed of about

A man leans over the edge of a cliff and throws a rock upward at 4.9 m/s.How far below the level from which it was thrown is the rock 2 seconds later?

If a freely falling object were somehow equipped with a speedometer,its speed reading would increase each second by about

A bullet is fired straight down from the top of a high cliff.Neglecting air resistance,the acceleration of the bullet in meters per second per second

An object falls freely from rest on a planet where the acceleration due to gravity is twice as much as it is on Earth.In the first 5 seconds it falls a distance of

A horse gallops a distance of 10 kilometers in a time of 30 minutes.Its average speed is

A hockey puck is set in motion across a frozen pond.If ice friction and air resistance are neglected,the force required to keep the puck sliding at constant velocity is

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

If a rocket initially at rest accelerates at a rate of 50 m/s2 for one minute,its speed will be

A car maintains a constant velocity of 100 km/hr for 10 seconds.During this interval its acceleration is

If a car increases its velocity from zero to 60 km/h in 10 seconds,its acceleration is

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

When a rock thrown straight upwards gets to the exact top of its path,its

Starting from rest,the distance a freely falling object will fall in 0.5 second is about

If an object falling freely were somehow equipped with an odometer to measure the distance it travels,then the amount of distance it travels each succeeding second would be

While an object near the Earth's surface is in free fall,its

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

The two measurements necessary for calculating average speed are

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