Question 1

FIGURE 2-7  
-Figure 2-7 represents the position of a particle as it travels along the x-axis. What is the average speed of the particle between t = 1 s and t = 4 s?

Accepted Answer

A)  1.0 m/s 
B)  1.3 m/s 
C)  0.67 m/s 
D)  0.50 m/s 
E)  0.25 m/s 
A)  1.0 m/s 
B)  1.3 m/s 
C)  0.67 m/s 
D)  0.50 m/s 
E)  0.25 m/s B

Question 2

When is the average velocity of an object equal to the instantaneous velocity?

Accepted Answer

A)  always 
B)  never 
C)  only when the velocity is constant 
D)  only when the velocity is increasing at a constant rate 
E)  only when the velocity is decreasing at a constant rate 
A)  always 
B)  never 
C)  only when the velocity is constant 
D)  only when the velocity is increasing at a constant rate 
E)  only when the velocity is decreasing at a constant rate C

Question 3

An object is dropped from a bridge. A second object is thrown downwards 1.00 s later. They both reach the water 20.0 m below at the same instant. What was the initial speed of the second object?

Accepted Answer

A)  4.91 m/s 
B)  14.6 m/s 
C)  9.90 m/s 
D)  19.6 m/s 
E)  21.3 m/s 
A)  4.91 m/s 
B)  14.6 m/s 
C)  9.90 m/s 
D)  19.6 m/s 
E)  21.3 m/s B

Question 4

FIGURE 2-6  
-Refer to Figure 2-6. If you start from the Bakery, travel to the Cafe, and then to the Art Gallery, what is your displacement?

Accepted Answer

A)  6.5 km South 
B)  2.5 km South 
C)  10.5 km North 
D)  9.0 km North 
E)  1.5 km South 
A)  6.5 km South 
B)  2.5 km South 
C)  10.5 km North 
D)  9.0 km North 
E)  1.5 km South

Question 5

FIGURE 2-3  
-Figure 2-3 represents the position of a particle as it travels along the x-axis. What is the magnitude of the instantaneous velocity of the particle when t = 1 s?

Accepted Answer

The answer of FIGURE 2-3  
-Figure 2-3 represents the...

Question 6

A car is traveling at 26.0 m/s when the driver suddenly applies the brakes, giving the car a constant deceleration. The car comes to a stop in a distance of 120.0 m. How fast was the car moving when it was 30.0 m past the point where the brakes were applied?

Accepted Answer

A)  7.50 m/s 
B)  15.0 m/s 
C)  23.5 m/s 
D)  22.5 m/s 
E)  28.0 m/s 
A)  7.50 m/s 
B)  15.0 m/s 
C)  23.5 m/s 
D)  22.5 m/s 
E)  28.0 m/s

Question 7

A car starts from rest and accelerates at 6.00 m/s2. How far does it travel in 3.00 s?

Accepted Answer

A)  9.00 m 
B)  18.0 m 
C)  27.0 m 
D)  36.0 m 
E)  54.0 m 
A)  9.00 m 
B)  18.0 m 
C)  27.0 m 
D)  36.0 m 
E)  54.0 m

Question 8

During the time that the acceleration of a particle is constant, its velocity-vs.-time curve is

Accepted Answer

A)  a straight line. 
B)  a parabola opening downward. 
C)  a parabola opening upward. 
D)  a parabola opening toward the left. 
E)  a parabola opening toward the right. 
A)  a straight line. 
B)  a parabola opening downward. 
C)  a parabola opening upward. 
D)  a parabola opening toward the left. 
E)  a parabola opening toward the right.

Question 9

FIGURE 2-2  
-Figure 2-2 represents the position of a particle as it travels along the x-axis. What is the average speed of the particle between t = 0 s and t = 3 s?

Accepted Answer

The answer of FIGURE 2-2  
-Figure 2-2 represents the...

Question 10

Abby throws a ball straight up and times it. She sees that the ball goes by the top of a flagpole after 0.50 s and reaches the level of the top of the pole after a total elapsed time of 4.10 s. What was the speed of the ball at as it passed the top of the flagpole?

Accepted Answer

A)  6.40 m/s 
B)  16.2 m/s 
C)  17.6 m/s 
D)  29.0 m/s 
E)  33 m/s 
A)  6.40 m/s 
B)  16.2 m/s 
C)  17.6 m/s 
D)  29.0 m/s 
E)  33 m/s

Question 11

An object is thrown upwards with a speed of 14 .0 m/s. How long does it take it to reach its maximum height?

Accepted Answer

A)  1.22 s 
B)  1.43 s 
C)  3.14 s 
D)  4.15 s 
E)  5.31 s 
A)  1.22 s 
B)  1.43 s 
C)  3.14 s 
D)  4.15 s 
E)  5.31 s

Question 12

An object is moving with constant non-zero velocity in the +x-axis. The position versus time graph of this object is

Accepted Answer

A)  a horizontal straight line. 
B)  a vertical straight line. 
C)  a straight line making an angle with the time axis. 
D)  a parabolic curve. 
E)  a hyperbolic curve. 
A)  a horizontal straight line. 
B)  a vertical straight line. 
C)  a straight line making an angle with the time axis. 
D)  a parabolic curve. 
E)  a hyperbolic curve.

Question 13

Suppose that a car traveling to the West (-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration.

Accepted Answer

A)  The car is decelerating, and its acceleration is positive. 
B)  The car is decelerating, and its acceleration is negative. 
C)  The acceleration is zero. 
D)  A statement cannot be made using the information given. 
A)  The car is decelerating, and its acceleration is positive. 
B)  The car is decelerating, and its acceleration is negative. 
C)  The acceleration is zero. 
D)  A statement cannot be made using the information given.

Question 14

The position of a particle as a function of time is given by x(t) = (3.5 m/s)t - (5.0 m/s2)t2. What is the average velocity of the particle between t = 0.30 s and t = 0.40 s?

Accepted Answer

Question 15

If the velocity versus time graph of an object is a straight line making an angle of 30 degrees with the time axis, the object is

Accepted Answer

A)  moving with constant non-zero speed. 
B)  moving with constant non-zero acceleration. 
C)  at rest. 
D)  moving with infinite speed. 
E)  none of the above 
A)  moving with constant non-zero speed. 
B)  moving with constant non-zero acceleration. 
C)  at rest. 
D)  moving with infinite speed. 
E)  none of the above

Question 16

A car traveling with velocity v is decelerated by a constant acceleration of magnitude a. It takes a time t to come to rest. If its initial velocity were doubled, the time required to stop would

Accepted Answer

A)  double as well. 
B)  decrease by a factor of two. 
C)  stay the same. 
D)  quadruple. 
E)  decrease by a factor of four. 
A)  double as well. 
B)  decrease by a factor of two. 
C)  stay the same. 
D)  quadruple. 
E)  decrease by a factor of four.

Question 17

Car A is traveling at twice the speed of car B. They both hit the brakes at the same time and undergo identical decelerations. How does the distance required for car A to stop compare with that for car B?

Accepted Answer

It takes f

Question 18

It is possible to have a zero acceleration, and still be moving.

Accepted Answer

A) True 
 B)False

Question 19

At a given instant, the acceleration of a certain particle is zero. This means that

Accepted Answer

A)  the velocity is constant. 
B)  the velocity is increasing. 
C)  the velocity is decreasing. 
D)  the velocity is not changing at that instant. 
E)  the velocity is zero. 
A)  the velocity is constant. 
B)  the velocity is increasing. 
C)  the velocity is decreasing. 
D)  the velocity is not changing at that instant. 
E)  the velocity is zero.

Question 20

A stone is thrown straight up. What is its acceleration on the way up?

Accepted Answer

The answer of A stone is thrown straight up. What...

Exam 2: One-Dimensional Kinematics

FIGURE 2-7 -Figure 2-7 represents the position of a particle as it travels along the x-axis. What is the average speed of the particle between t = 1 s and t = 4 s?

When is the average velocity of an object equal to the instantaneous velocity?

An object is dropped from a bridge. A second object is thrown downwards 1.00 s later. They both reach the water 20.0 m below at the same instant. What was the initial speed of the second object?

FIGURE 2-6 -Refer to Figure 2-6. If you start from the Bakery, travel to the Cafe, and then to the Art Gallery, what is your displacement?

FIGURE 2-3 -Figure 2-3 represents the position of a particle as it travels along the x-axis. What is the magnitude of the instantaneous velocity of the particle when t = 1 s?

A car is traveling at 26.0 m/s when the driver suddenly applies the brakes, giving the car a constant deceleration. The car comes to a stop in a distance of 120.0 m. How fast was the car moving when it was 30.0 m past the point where the brakes were applied?

A car starts from rest and accelerates at 6.00 m/s2. How far does it travel in 3.00 s?

During the time that the acceleration of a particle is constant, its velocity-vs.-time curve is

FIGURE 2-2 -Figure 2-2 represents the position of a particle as it travels along the x-axis. What is the average speed of the particle between t = 0 s and t = 3 s?

Abby throws a ball straight up and times it. She sees that the ball goes by the top of a flagpole after 0.50 s and reaches the level of the top of the pole after a total elapsed time of 4.10 s. What was the speed of the ball at as it passed the top of the flagpole?

An object is thrown upwards with a speed of 14 .0 m/s. How long does it take it to reach its maximum height?

An object is moving with constant non-zero velocity in the +x-axis. The position versus time graph of this object is

Suppose that a car traveling to the West (-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration.

The position of a particle as a function of time is given by x(t) = (3.5 m/s)t - (5.0 m/s2)t2. What is the average velocity of the particle between t = 0.30 s and t = 0.40 s?

If the velocity versus time graph of an object is a straight line making an angle of 30 degrees with the time axis, the object is

A car traveling with velocity v is decelerated by a constant acceleration of magnitude a. It takes a time t to come to rest. If its initial velocity were doubled, the time required to stop would

Car A is traveling at twice the speed of car B. They both hit the brakes at the same time and undergo identical decelerations. How does the distance required for car A to stop compare with that for car B?

It is possible to have a zero acceleration, and still be moving.

At a given instant, the acceleration of a certain particle is zero. This means that

A stone is thrown straight up. What is its acceleration on the way up?

Introduction to Physics

Vectors in Physics

Two-Dimensional Kinematics

Newtons Laws of Motion

Applications of Newtons Laws

Work and Kinetic Energy

Potential Energy and Conservation of Energy

Linear Momentum and Collisions

Rotational Kinematics and Energy

Rotational Dynamics and Static Equilibrium

Gravity

Oscillations About Equilibrium

Waves and Sound

Fluids

Temperature and Heat

Phases and Phase Changes

The Laws of Thermodynamics

Electric Charges, Forces, and Fields

Electric Potential and Electric Potential Energy

Electric Current and Direct-Current Circuits

Magnetism

Magnetic Flux and Faradays Law of Induction

Alternating-Current Circuits

Electromagnetic Waves

Geometrical Optics

Optical Instruments

Physical Optics: Interference and Diffraction

Relativity

Quantum Physics

Atomic Physics

Nuclear Physics and Nuclear Radiation

Filters

A car starts from rest and accelerates at 6.00 m/s². How far does it travel in 3.00 s?

The position of a particle as a function of time is given by x(t) = (3.5 m/s)t - (5.0 m/s²)t². What is the average velocity of the particle between t = 0.30 s and t = 0.40 s?