Question 1

An object is thrown upwards with a speed of 13 m/s. How long does it take to reach a height of 4.0 m above the projection point while descending?

Accepted Answer

A)  0.42 s 
B)  1.2 s 
C)  2.3 s 
D)  3.1 s 
E)  4.2 s 
A)  0.42 s 
B)  1.2 s 
C)  2.3 s 
D)  3.1 s 
E)  4.2 s

Question 2

FIGURE 2-8  
-Figure 2-8 represents the position of a particle as it travels along the x-axis. How does the instantaneous speed of the particle when t = 2 s compare with its speed when t = 4 s?

Accepted Answer

A)  The speed at t = 2 s is larger. 
B)  The speed at t = 2 s is smaller. 
C)  They are about equal. 
D)  The speed at t = 4 s is the negative of the speed at t = 2 s. 
E)  The speed at t = 2 s is the negative of the speed at t = 4 s. 
A)  The speed at t = 2 s is larger. 
B)  The speed at t = 2 s is smaller. 
C)  They are about equal. 
D)  The speed at t = 4 s is the negative of the speed at t = 2 s. 
E)  The speed at t = 2 s is the negative of the speed at t = 4 s.

Question 3

Two athletes jump straight up. John has twice the initial speed of Harry. Compared to Harry, John jumps

Accepted Answer

A)  0.50 times as long. 
B)  1.41 times as long. 
C)  twice as long. 
D)  three times as long. 
E)  four times as long. 
A)  0.50 times as long. 
B)  1.41 times as long. 
C)  twice as long. 
D)  three times as long. 
E)  four times as long.

Question 4

From the edge of a roof top you toss a green ball upwards with initial velocity v0 and a blue ball downwards with the same initial velocity. When they reach the ground below,

Accepted Answer

A)  the green ball will be moving faster than the blue ball. 
B)  the blue ball will be moving faster than the green ball. 
C)  the two balls will have the same speed. 
A)  the green ball will be moving faster than the blue ball. 
B)  the blue ball will be moving faster than the green ball. 
C)  the two balls will have the same speed.

Question 5

If the velocity versus time graph of an object is a horizontal line, 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 6

A car is moving with a constant acceleration. At t = 5.0 s its velocity is 8.0 m/s and at t = 8.0 s its velocity is 12.0 m/s. What is the distance traveled in that interval of time?

Accepted Answer

A)  10 m 
B)  20 m 
C)  30 m 
D)  40 m 
E)  50 m 
A)  10 m 
B)  20 m 
C)  30 m 
D)  40 m 
E)  50 m

Question 7

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 = 2 s and t = 4 s?

Accepted Answer

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

Question 8

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 0.5 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?

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 9

When the velocity and acceleration of an object have opposite signs, the speed of the object increases.

Accepted Answer

A) True 
 B)False

Question 10

A stone is thrown straight up. What is its acceleration at the highest point?

Accepted Answer

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

Question 11

A car is moving with a speed of 32.0 m/s. The driver sees an accident ahead and slams on the brakes, giving the car a deceleration of 3.50 m/s2. How far does the car travel after the driver put on the brakes before it comes to a stop?

Accepted Answer

A)  4.57 m 
B)  9.14 m 
C)  112 m 
D)  146 m 
E)  292 m 
A)  4.57 m 
B)  9.14 m 
C)  112 m 
D)  146 m 
E)  292 m

Question 12

Which statement below about the distance between the starting and ending positions and the displacement between the starting and ending positions is correct?

Accepted Answer

A)  The distance between the starting and ending positions is twice the magnitude of the displacement between the starting and ending positions. 
B)  The distance between the starting and ending positions is equal to the magnitude of the displacement between the starting and ending positions. 
C)  The distance between the starting and ending positions is the negative of the magnitude of the displacement between the starting and ending positions. 
D)  The distance between the starting and ending positions is greater than the magnitude of the displacement between the starting and ending positions. 
E)  The distance between the starting and ending positions is less than the magnitude of the displacement between the starting and ending positions. 
A)  The distance between the starting and ending positions is twice the magnitude of the displacement between the starting and ending positions. 
B)  The distance between the starting and ending positions is equal to the magnitude of the displacement between the starting and ending positions. 
C)  The distance between the starting and ending positions is the negative of the magnitude of the displacement between the starting and ending positions. 
D)  The distance between the starting and ending positions is greater than the magnitude of the displacement between the starting and ending positions. 
E)  The distance between the starting and ending positions is less than the magnitude of the displacement between the starting and ending positions.

Exam 2: One-Dimensional Kinematics

An object is thrown upwards with a speed of 13 m/s. How long does it take to reach a height of 4.0 m above the projection point while descending?

FIGURE 2-8 -Figure 2-8 represents the position of a particle as it travels along the x-axis. How does the instantaneous speed of the particle when t = 2 s compare with its speed when t = 4 s?

Two athletes jump straight up. John has twice the initial speed of Harry. Compared to Harry, John jumps

From the edge of a roof top you toss a green ball upwards with initial velocity v0 and a blue ball downwards with the same initial velocity. When they reach the ground below,

If the velocity versus time graph of an object is a horizontal line, the object is

A car is moving with a constant acceleration. At t = 5.0 s its velocity is 8.0 m/s and at t = 8.0 s its velocity is 12.0 m/s. What is the distance traveled in that interval of time?

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 = 2 s and t = 4 s?

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 0.5 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?

When the velocity and acceleration of an object have opposite signs, the speed of the object increases.

A stone is thrown straight up. What is its acceleration at the highest point?

A car is moving with a speed of 32.0 m/s. The driver sees an accident ahead and slams on the brakes, giving the car a deceleration of 3.50 m/s2. How far does the car travel after the driver put on the brakes before it comes to a stop?

Which statement below about the distance between the starting and ending positions and the displacement between the starting and ending positions is correct?

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

From the edge of a roof top you toss a green ball upwards with initial velocity v₀ and a blue ball downwards with the same initial velocity. When they reach the ground below,

A car is moving with a speed of 32.0 m/s. The driver sees an accident ahead and slams on the brakes, giving the car a deceleration of 3.50 m/s². How far does the car travel after the driver put on the brakes before it comes to a stop?