Question 1

A student throws a ball straight up at 22 m/s,releasing the ball 1.5 m above the ground.What is the maximum height of the ball above the ground?

Accepted Answer

A) 24.7 m 
B) 3.0 m 
C) 15.3 m 
D) 26.2 m 
E) 27.7 m 
A) 24.7 m 
B) 3.0 m 
C) 15.3 m 
D) 26.2 m 
E) 27.7 m

Question 2

Two girls stand at the edge of a cliff.One girl throws a stone upwards with a velocity of 10.0 m/s and the other throws her stone downwards at 10.0 m/s.If they threw them from the same height at the same time,which stone will have the greatest speed when it hits the ground?

Accepted Answer

A) The stone that was thrown upward 
B) The stone that was thrown downward 
C) They will have the same speed. 
A) The stone that was thrown upward 
B) The stone that was thrown downward 
C) They will have the same speed.

Question 3

A car travels north at 30 m/s for 10 minutes.It then travels south at 40 m/s for 20 minutes.The total distance the car has traveled and its displacement are,respectively,

Accepted Answer

A) 66 km and 30 km. 
B) 30 km and 66 km. 
C) 51 km and 9 km. 
D) 9 km and 51 km. 
E) 51 km and 30 km. 
A) 66 km and 30 km. 
B) 30 km and 66 km. 
C) 51 km and 9 km. 
D) 9 km and 51 km. 
E) 51 km and 30 km.

Question 4

The graph of the position of a DNA molecule (on the vertical axis)vs.time (on the horizontal axis)is a straight line that does not go through the origin and does not have a slope of zero.Which statement is true?

Accepted Answer

A) Its speed is always zero. 
B) Its velocity is constant. 
C) Its position is always zero. 
D) Its acceleration is not zero. 
A) Its speed is always zero. 
B) Its velocity is constant. 
C) Its position is always zero. 
D) Its acceleration is not zero.

Question 5

An object starts from the origin and goes along the x-axis to x = 10 m in 2 s,stops for 5.5 s,and then travels at v = -4 m/s for 2.5 s? What is the average speed and velocity in m/s?

Accepted Answer

A) speed = 2,velocity = 2 
B) speed = 2,velocity = 0 
C) speed = 2,velocity = -2 
D) speed = 0,velocity = 0 
E) speed = 4,velocity = 0 
A) speed = 2,velocity = 2 
B) speed = 2,velocity = 0 
C) speed = 2,velocity = -2 
D) speed = 0,velocity = 0 
E) speed = 4,velocity = 0

Question 6

A police officer spots a speeding car traveling at 20 m/s (approximately 44 mph)as it passes.The officer immediately starts to drive,accelerating from rest at a rate of 5 m/s2.How far will the officer have to drive before catching up to the speeding car?

Accepted Answer

A) 100 m 
B) 80 m 
C) 500 m 
D) 16 m 
E) 160 m 
A) 100 m 
B) 80 m 
C) 500 m 
D) 16 m 
E) 160 m

Question 7

What is your average speed in m/s when you start from the origin and go along the x-axis at v = 10 m/s for 2 s,stops for 5 s,and then travels at v = -4 m/s for 3 s?

Accepted Answer

A) -2.7 
B) 3.2 
C) 4.0 
D) 1.0 
E) 0.80 
A) -2.7 
B) 3.2 
C) 4.0 
D) 1.0 
E) 0.80

Question 8

An elevator is moving up with 8 m/s when a bolt came loose from the bottom.The bolt reaches the bottom of the shaft in 4 seconds.The velocity of the bolt at the bottom is

Accepted Answer

A) 39 m/s. 
B) 21 m/s. 
C) -31.2 m/s. 
D) -47.2 m/s. 
A) 39 m/s. 
B) 21 m/s. 
C) -31.2 m/s. 
D) -47.2 m/s.

Question 9

A rocket accelerates uniformly from 1000 to 4000 m/s over a distance of 5 km.How long did it take in seconds?

Accepted Answer

A) 0.15 
B) 2 
C) 15 
D) 156 
E) 983 
A) 0.15 
B) 2 
C) 15 
D) 156 
E) 983

Question 10

At time,t = 0 s,car A is at rest at the origin of the coordinate system and car B is moving due East at a constant velocity of 20 m/s.When car B is 50 m west of car A,car A starts to move at a constant acceleration of 2 m/s2 due East.How far from the origin has car A moved when car B overtakes car A?

Accepted Answer

A) 20.0 m 
B) 8.58 m 
C) 14.3 m 
D) 2.0 m 
E) 4.36 m 
A) 20.0 m 
B) 8.58 m 
C) 14.3 m 
D) 2.0 m 
E) 4.36 m

Question 11

A ball is thrown straight up into the air,it reaches the top of its path and then falls back down to its initial position.During its flight,when is its speed greater than zero? Ignore air resistance.

Accepted Answer

A) only when it's moving up 
B) when it's moving up and when it's moving down 
C) never 
D) only when it's moving down 
E) always 
A) only when it's moving up 
B) when it's moving up and when it's moving down 
C) never 
D) only when it's moving down 
E) always

Question 12

A car takes 60.0 minutes to travel 100 km.During this one-hour trip,the car stops for 5 minutes to get gas.The speed limit on the road that the car traveled on is 100 km/hr.Which of the following statements is true?

Accepted Answer

A) The car never exceeded the speed limit during this trip. 
B) The car must have exceeded the speed limit at some point during this trip. 
C) There is not enough information to determine whether the car exceeded the speed limit during this trip. 
D) The car's speed was 100 km/hr during the whole trip. 
A) The car never exceeded the speed limit during this trip. 
B) The car must have exceeded the speed limit at some point during this trip. 
C) There is not enough information to determine whether the car exceeded the speed limit during this trip. 
D) The car's speed was 100 km/hr during the whole trip.

Question 13

The position of a nanoparticle as a function of time is x(t)= t2 - t - 6,where x is measured in meters,t is measured in seconds and t > 0.When is the speed of the nanoparticle zero?

Accepted Answer

A) when t = 0.5 s 
B) when t = 2 s 
C) when t = 3 s 
D) The speed of the nanoparticle is never zero. 
A) when t = 0.5 s 
B) when t = 2 s 
C) when t = 3 s 
D) The speed of the nanoparticle is never zero.

Question 14

A rocket,speeding along toward Alpha Centauri,has an acceleration a(t)= At2.Assume that the rocket began at rest at the Earth (x = 0)at t = 0.Assuming it simply travels in a straight line from Earth to Alpha Centauri (and beyond),what is the ratio of the speed of the rocket when it has covered half the distance to the star to its speed when it has travelled half the time necessary to reach Alpha Centauri?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 15

A stone is thrown downward with an initial velocity of 5.00 m/s.The acceleration of the stone is constant and has the value of the free fall acceleration,9.81 m/s2.The speed of the stone after 0.750 s is

Accepted Answer

A) 12.4 m/s. 
B) 14.9 m/s. 
C) 22.7 m/s. 
D) 32.3 m/s. 
E) 0 m/s. 
A) 12.4 m/s. 
B) 14.9 m/s. 
C) 22.7 m/s. 
D) 32.3 m/s. 
E) 0 m/s.

Question 16

A person fires a warning shot out of handgun.If the bullet leaves the gun with an initial speed of 305 m/s and travels straight upward,how much time does the person firing the gun have to move out of the way before the bullet hits the ground? (Ignore the effects of air resistance.)

Accepted Answer

A) 15.6 s 
B) 31.1 s 
C) 62.2 s 
D) None are correct. 
A) 15.6 s 
B) 31.1 s 
C) 62.2 s 
D) None are correct.

Question 17

A runner starts from rest and runs a distance of 100 m in 10.0 s.What is his average acceleration in m/s2?

Accepted Answer

A) 9.81 
B) 1.40 
C) 2.00 
D) 98.6 
E) 3.50 
A) 9.81 
B) 1.40 
C) 2.00 
D) 98.6 
E) 3.50

Question 18

The graph of the velocity of a rocket (on the vertical axis)vs.time (on the horizontal axis)is a straight line that does not go through the origin and does not have a slope of zero.Which statement is true?

Accepted Answer

A) Its position is always zero. 
B) Its speed is always zero. 
C) Its acceleration is not zero. 
D) Its velocity is constant. 
A) Its position is always zero. 
B) Its speed is always zero. 
C) Its acceleration is not zero. 
D) Its velocity is constant.

Question 19

A helicopter lifts off at a constant acceleration of 2.3 m/s2 upward.When after liftoff is the speed of the above helicopter 10.0 m/s?

Accepted Answer

A) 2.8 s 
B) 2.9 s 
C) 4.0 s 
D) 4.3 s 
A) 2.8 s 
B) 2.9 s 
C) 4.0 s 
D) 4.3 s

Question 20

A ball is thrown straight up into the air,it reaches the top of its path and then falls back down to its initial position.During its flight,when is it accelerating in the downward direction? Ignore air resistance.

Accepted Answer

A) always 
B) when it's moving up 
C) never 
D) when it's moving down 
A) always 
B) when it's moving up 
C) never 
D) when it's moving down

Exam 2: Motion in a Straight Line

A student throws a ball straight up at 22 m/s,releasing the ball 1.5 m above the ground.What is the maximum height of the ball above the ground?

Two girls stand at the edge of a cliff.One girl throws a stone upwards with a velocity of 10.0 m/s and the other throws her stone downwards at 10.0 m/s.If they threw them from the same height at the same time,which stone will have the greatest speed when it hits the ground?

A car travels north at 30 m/s for 10 minutes.It then travels south at 40 m/s for 20 minutes.The total distance the car has traveled and its displacement are,respectively,

The graph of the position of a DNA molecule (on the vertical axis)vs.time (on the horizontal axis)is a straight line that does not go through the origin and does not have a slope of zero.Which statement is true?

An object starts from the origin and goes along the x-axis to x = 10 m in 2 s,stops for 5.5 s,and then travels at v = -4 m/s for 2.5 s? What is the average speed and velocity in m/s?

A police officer spots a speeding car traveling at 20 m/s (approximately 44 mph)as it passes.The officer immediately starts to drive,accelerating from rest at a rate of 5 m/s2.How far will the officer have to drive before catching up to the speeding car?

What is your average speed in m/s when you start from the origin and go along the x-axis at v = 10 m/s for 2 s,stops for 5 s,and then travels at v = -4 m/s for 3 s?

An elevator is moving up with 8 m/s when a bolt came loose from the bottom.The bolt reaches the bottom of the shaft in 4 seconds.The velocity of the bolt at the bottom is

A rocket accelerates uniformly from 1000 to 4000 m/s over a distance of 5 km.How long did it take in seconds?

A ball is thrown straight up into the air,it reaches the top of its path and then falls back down to its initial position.During its flight,when is its speed greater than zero? Ignore air resistance.

A car takes 60.0 minutes to travel 100 km.During this one-hour trip,the car stops for 5 minutes to get gas.The speed limit on the road that the car traveled on is 100 km/hr.Which of the following statements is true?

The position of a nanoparticle as a function of time is x(t)= t2 - t - 6,where x is measured in meters,t is measured in seconds and t > 0.When is the speed of the nanoparticle zero?

A stone is thrown downward with an initial velocity of 5.00 m/s.The acceleration of the stone is constant and has the value of the free fall acceleration,9.81 m/s2.The speed of the stone after 0.750 s is

A person fires a warning shot out of handgun.If the bullet leaves the gun with an initial speed of 305 m/s and travels straight upward,how much time does the person firing the gun have to move out of the way before the bullet hits the ground? (Ignore the effects of air resistance.)

A runner starts from rest and runs a distance of 100 m in 10.0 s.What is his average acceleration in m/s2?

The graph of the velocity of a rocket (on the vertical axis)vs.time (on the horizontal axis)is a straight line that does not go through the origin and does not have a slope of zero.Which statement is true?

A helicopter lifts off at a constant acceleration of 2.3 m/s2 upward.When after liftoff is the speed of the above helicopter 10.0 m/s?

A ball is thrown straight up into the air,it reaches the top of its path and then falls back down to its initial position.During its flight,when is it accelerating in the downward direction? Ignore air resistance.

Overview

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Heat and the First Law of Thermodynamics

Ideal Gases

The Second Law of Thermodynamics

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Electric Fields and Gausss Law

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Filters

A police officer spots a speeding car traveling at 20 m/s (approximately 44 mph)as it passes.The officer immediately starts to drive,accelerating from rest at a rate of 5 m/s².How far will the officer have to drive before catching up to the speeding car?

The position of a nanoparticle as a function of time is x(t)= t² - t - 6,where x is measured in meters,t is measured in seconds and t > 0.When is the speed of the nanoparticle zero?

A stone is thrown downward with an initial velocity of 5.00 m/s.The acceleration of the stone is constant and has the value of the free fall acceleration,9.81 m/s².The speed of the stone after 0.750 s is

A runner starts from rest and runs a distance of 100 m in 10.0 s.What is his average acceleration in m/s²?

A helicopter lifts off at a constant acceleration of 2.3 m/s² upward.When after liftoff is the speed of the above helicopter 10.0 m/s?