Question 1

The figure shows the velocity of a particle as it travels along the x-axis.What is the direction of the acceleration at t = 0.5 s?

Accepted Answer

A) in the +x direction 
B) in the -x direction 
C) The acceleration is zero. 
A) in the +x direction 
B) in the -x direction 
C) The acceleration is zero.

Question 2

To determine the height of a flagpole,Abby throws a ball straight up and times it.She sees that the ball goes by the top of the pole after 0.50 s and then reaches the top of the pole again after a total elapsed time of 4.1 s.How high is the pole above the point where the ball was launched? (You can ignore air resistance.)

Accepted Answer

A) 10 m 
B) 13 m 
C) 16 m 
D) 18 m 
E) 26 m 
A) 10 m 
B) 13 m 
C) 16 m 
D) 18 m 
E) 26 m

Question 3

The position of an object is given by   where       and x and t are in SI units.What is the instantaneous acceleration of the object when

Accepted Answer

A) -13 m/s2 
B) 2.9 m/s2 
C) 4.6 m/s2 
D) 13 m/s2 
A) -13 m/s2 
B) 2.9 m/s2 
C) 4.6 m/s2 
D) 13 m/s2

Question 4

The figure shows the position of an object (moving along a straight line)as a function of time.Assume two significant figures in each number.Which of the following statements about this object is true over the interval shown?

Accepted Answer

A) The object is accelerating to the left. 
B) The object is accelerating to the right. 
C) The acceleration of the object is in the same direction as its velocity. 
D) The average speed of the object is 1.0 m/s. 
A) The object is accelerating to the left. 
B) The object is accelerating to the right. 
C) The acceleration of the object is in the same direction as its velocity. 
D) The average speed of the object is 1.0 m/s.

Question 5

The figure represents the velocity of a particle as it travels along the x-axis.At what value (or values)of t is the instantaneous acceleration equal to zero?

Accepted Answer

A) t = 0 
B) t = 0.5 s and t = 2 s 
C) t = 1 s 
A) t = 0 
B) t = 0.5 s and t = 2 s 
C) t = 1 s

Question 6

Two objects are dropped from a bridge,an interval of 1.0 s apart,and experience no appreciable air resistance.As time progresses,the DIFFERENCE in their speeds

Accepted Answer

A) increases. 
B) remains constant. 
C) decreases. 
D) increases at first,but then stays constant. 
E) decreases at first,but then stays constant. 
A) increases. 
B) remains constant. 
C) decreases. 
D) increases at first,but then stays constant. 
E) decreases at first,but then stays constant.

Question 7

If the graph of the position as a function of time for an object is a horizontal line,that object cannot be accelerating.

Accepted Answer

A) True 
 B)False

Question 8

The velocity of an object is given by the expression v(t)= 3.00 m/s + (4.00 m/s3)t2,where t is in seconds.Determine the position of the object as a function of time if it is located at x = 1.00 m at time   .

Accepted Answer

A) (4.00 m/s)t + 1.00 m 
B) (3.00 m/s)t + (1.33 m/s3)t3 
C) (4.00 m/s)t 
D) 1.33 m 
E) 1.00 m + (3.00 m/s)t + (1.33 m/s3)t3 
A) (4.00 m/s)t + 1.00 m 
B) (3.00 m/s)t + (1.33 m/s3)t3 
C) (4.00 m/s)t 
D) 1.33 m 
E) 1.00 m + (3.00 m/s)t + (1.33 m/s3)t3

Question 9

If the acceleration of an object is negative,the object must be slowing down.

Accepted Answer

A) True 
 B)False

Question 10

Which one of the following graphs could possibly represent the vertical position as a function of time for an object in free fall?

Accepted Answer

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

Question 11

An object is moving in a straight line along the x-axis.A plot of its velocity in the x direction as a function of time is shown in the figure.Which graph represents its acceleration in the x direction as a function of time?

Accepted Answer

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

Question 12

The position of an object as a function of time is given by x =   - ct,where b = 2.0 m/   and   and x and t are in SI units.What is the instantaneous velocity of the object when

Accepted Answer

A) 1.7 m/s 
B) 2.1 m/s 
C) 2.3 m/s 
D) 2.7 m/s 
A) 1.7 m/s 
B) 2.1 m/s 
C) 2.3 m/s 
D) 2.7 m/s

Question 13

A ball is projected upward at time t = 0.0 s,from a point on a roof 90 m above the ground.The ball rises,then falls and strikes the ground.The initial velocity of the ball is   if air resistance is negligible.The time when the ball strikes the ground is closest to

Accepted Answer

A) 9.4 s 
B) 9.0 s 
C) 8.7 s 
D) 9.7 s 
E) 10 s 
A) 9.4 s 
B) 9.0 s 
C) 8.7 s 
D) 9.7 s 
E) 10 s

Question 14

At the same moment from the top of a building 3.0 × 102 m tall,one rock is dropped and one is thrown downward with an initial velocity of   .Both of them experience negligible air resistance.How much EARLIER does the thrown rock strike the ground?

Accepted Answer

A) 0.95 s 
B) 0.86 s 
C) 0.67 s 
D) They land at exactly the same time. 
A) 0.95 s 
B) 0.86 s 
C) 0.67 s 
D) They land at exactly the same time.

Question 15

A runner maintains constant acceleration after starting from rest as she runs a distance of 60.0 m.The runner's speed at the end of the 60.0 m is 9.00 m/s.How much time did it take the runner to complete the 60.0 m distance?

Accepted Answer

A) 6.67 s 
B) 15.0 s 
C) 9.80 s 
D) 10.2 s 
E) 13.3 s 
A) 6.67 s 
B) 15.0 s 
C) 9.80 s 
D) 10.2 s 
E) 13.3 s

Question 16

The figure shows a graph of the velocity as a function of time for a basketball player traveling up and down the court in a straight-line path.For the 10 s shown on the graph,find
(a)the net displacement of the player.
(b)the total distance run by the player.

Accepted Answer

The answer of The figure shows a graph of the...

Question 17

If the fastest you can safely drive is   what is the longest time you can stop for dinner if you must travel   in   total?

Accepted Answer

A) 1.0 h 
B) 1.3 h 
C) 1.4 h 
D) You can't stop at all. 
A) 1.0 h 
B) 1.3 h 
C) 1.4 h 
D) You can't stop at all.

Question 18

The velocity of an object as a function of time is given by v(t)= 2.00 m/s + (3.00 m/s)t - (1.0 m/s2)t2.Determine the instantaneous acceleration of the object at time t = 4.00 s.

Accepted Answer

A) -2.00 m/s2 
B) -5.00 m/s2 
C) 1.00 m/s2 
D) 0.00 m/s2 
E) -1.00 m/s2 
A) -2.00 m/s2 
B) -5.00 m/s2 
C) 1.00 m/s2 
D) 0.00 m/s2 
E) -1.00 m/s2

Question 19

A toy rocket is launched vertically from ground level (y = 0.00 m),at time t = 0.00 s.The rocket engine provides constant upward acceleration during the burn phase.At the instant of engine burnout,the rocket has risen to 72 m and acquired a velocity of   The rocket continues to rise in unpowered flight,reaches maximum height,and falls back to the ground with negligible air resistance.The speed of the rocket upon impact on the ground is closest to

Accepted Answer

A) 48 m/s 
B) 44 m/s 
C) 39 m/s 
D) 54 m/s 
E) 59 m/s 
A) 48 m/s 
B) 44 m/s 
C) 39 m/s 
D) 54 m/s 
E) 59 m/s

Question 20

A racing car accelerates uniformly from rest along a straight track.This track has markers spaced at equal distances along it from the start,as shown in the figure.The car reaches a speed of 140 km/h as it passes marker 2.Where on the track was the car when it was traveling at 70 km/h?

Accepted Answer

A) Before marker 1 
B) At marker 1 
C) Between marker 1 and marker 2 
A) Before marker 1 
B) At marker 1 
C) Between marker 1 and marker 2

Exam 2: Kinematics in One Dimension

The figure shows the velocity of a particle as it travels along the x-axis.What is the direction of the acceleration at t = 0.5 s?

The position of an object is given by where and x and t are in SI units.What is the instantaneous acceleration of the object when

The figure shows the position of an object (moving along a straight line)as a function of time.Assume two significant figures in each number.Which of the following statements about this object is true over the interval shown?

The figure represents the velocity of a particle as it travels along the x-axis.At what value (or values)of t is the instantaneous acceleration equal to zero?

Two objects are dropped from a bridge,an interval of 1.0 s apart,and experience no appreciable air resistance.As time progresses,the DIFFERENCE in their speeds

If the graph of the position as a function of time for an object is a horizontal line,that object cannot be accelerating.

The velocity of an object is given by the expression v(t)= 3.00 m/s + (4.00 m/s3)t2,where t is in seconds.Determine the position of the object as a function of time if it is located at x = 1.00 m at time .

If the acceleration of an object is negative,the object must be slowing down.

Which one of the following graphs could possibly represent the vertical position as a function of time for an object in free fall?

An object is moving in a straight line along the x-axis.A plot of its velocity in the x direction as a function of time is shown in the figure.Which graph represents its acceleration in the x direction as a function of time?

The position of an object as a function of time is given by x = - ct,where b = 2.0 m/ and and x and t are in SI units.What is the instantaneous velocity of the object when

A ball is projected upward at time t = 0.0 s,from a point on a roof 90 m above the ground.The ball rises,then falls and strikes the ground.The initial velocity of the ball is if air resistance is negligible.The time when the ball strikes the ground is closest to

At the same moment from the top of a building 3.0 × 102 m tall,one rock is dropped and one is thrown downward with an initial velocity of .Both of them experience negligible air resistance.How much EARLIER does the thrown rock strike the ground?

A runner maintains constant acceleration after starting from rest as she runs a distance of 60.0 m.The runner's speed at the end of the 60.0 m is 9.00 m/s.How much time did it take the runner to complete the 60.0 m distance?

The figure shows a graph of the velocity as a function of time for a basketball player traveling up and down the court in a straight-line path.For the 10 s shown on the graph,find (a)the net displacement of the player. (b)the total distance run by the player.

If the fastest you can safely drive is what is the longest time you can stop for dinner if you must travel in total?

The velocity of an object as a function of time is given by v(t)= 2.00 m/s + (3.00 m/s)t - (1.0 m/s2)t2.Determine the instantaneous acceleration of the object at time t = 4.00 s.

A racing car accelerates uniformly from rest along a straight track.This track has markers spaced at equal distances along it from the start,as shown in the figure.The car reaches a speed of 140 km/h as it passes marker 2.Where on the track was the car when it was traveling at 70 km/h?

Concepts of Motion

Vectors and Coordinate Systems

Kinematics in Two Dimensions

Force and Motion

Dynamics I: Motion Along a Line

Newtons Third Law

Dynamics II: Motion in a Plane

Work and Kinetic Energy

Interactions and Potential Energy

Impulse and Momentum

Rotation of a Rigid Body

Newtons Theory of Gravity

Fluids and Elasticity

Oscillations

Traveling Waves

Superposition

A Macroscopic Description of Matter

Work, heat, and the First Law of Thermodynamics

The Micromacro Connection

Heat Engines and Refrigerators

Electric Charges and Forces

The Electric Field

Gausss Law

The Electric Potential

Potential and Field

Current and Resistance

Fundamentals of Circuits

The Magnetic Field

Electromagnetic Induction

Electromagnetic Fields and Waves

Ac Circuits

Wave Optics

Ray Optics

Optical Instruments

Relativity

The Foundations of Modern Physics

Quantization

Wave Functions and Uncertainty

One-Dimensional Quantum Mechanics

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The velocity of an object is given by the expression v(t)= 3.00 m/s + (4.00 m/s³)t²,where t is in seconds.Determine the position of the object as a function of time if it is located at x = 1.00 m at time .

At the same moment from the top of a building 3.0 × 10² m tall,one rock is dropped and one is thrown downward with an initial velocity of .Both of them experience negligible air resistance.How much EARLIER does the thrown rock strike the ground?

The velocity of an object as a function of time is given by v(t)= 2.00 m/s + (3.00 m/s)t - (1.0 m/s²)t².Determine the instantaneous acceleration of the object at time t = 4.00 s.