Question 1

Explain how a POSITIVE acceleration could produce a DECELERATION.

Accepted Answer

An object which was moving in the negati

Question 2

Which physical unit is the SI acceleration of gravity?

Accepted Answer

A)  32 ft/s2  
B)  -120 mi/s 
C)  186,000 mi 
D)  40 km, SW 
E)  9.8 m/s2 
A)  32 ft/s2  
B)  -120 mi/s 
C)  186,000 mi 
D)  40 km, SW 
E)  9.8 m/s2

Question 3

A new car manufacturer advertises that their car can go "from zero to sixty in 8 s." This is a description of

Accepted Answer

A)  average acceleration. 
B)  instantaneous speed. 
C)  average speed. 
D)  instantaneous acceleration. 
E)  none of the given answers. 
A)  average acceleration. 
B)  instantaneous speed. 
C)  average speed. 
D)  instantaneous acceleration. 
E)  none of the given answers.

Question 4

The slope of a tangent line at a given time value on a velocity versus time graph gives

Accepted Answer

A)  average acceleration 
B)  average velocity. 
C)  instantaneous acceleration. 
D)  instantaneous velocity. 
E)  none of the given answers. 
A)  average acceleration 
B)  average velocity. 
C)  instantaneous acceleration. 
D)  instantaneous velocity. 
E)  none of the given answers.

Question 5

Contrast Aristotle's predictions concerning free-falling bodies with Galileo's predictions.

Accepted Answer

Aristotle said heavier bodies fall faste

Question 6

-Refer to Figure 2-10. If you start from the Bakery, travel to the Cafe, and then to the Art Gallery, what is the distance you have traveled?

Accepted Answer

A)  2.5 km 
B)  0 km 
C)  10.5 km 
D)  4.0 km 
E)  6.5 km 
A)  2.5 km 
B)  0 km 
C)  10.5 km 
D)  4.0 km 
E)  6.5 km

Question 7

Jane walks 31 steps eastward and 16 steps southward. What is her displacement if each step averages 0.82 meters?

Accepted Answer

29. m at 2

Question 8

Which graph in Figure 2-4 represents constant positive acceleration?
Figure 2-4

Accepted Answer

A)  graph a 
B)  graph b 
C)  graph c 
D)  graph d 
E)  both graphs c and d 
A)  graph a 
B)  graph b 
C)  graph c 
D)  graph d 
E)  both graphs c and d

Question 9

A car starts from rest and accelerates uniformly at 3 m/s2. A second car starts from rest 6 s later at the same point and accelerates uniformly at 5 m/ s2. How long does it take the second car to overtake the first car?

Accepted Answer

A)  22.7 s 
B)  24.0 s 
C)  35.0 s 
D)  18.9 s 
E)  12.2 s 
A)  22.7 s 
B)  24.0 s 
C)  35.0 s 
D)  18.9 s 
E)  12.2 s

Question 10

The slope of a line connecting two points on a velocity versus time graph gives

Accepted Answer

A)  instantaneous acceleration. 
B)  instantaneous velocity. 
C)  average acceleration 
D)  average velocity. 
E)  none of the given answers. 
A)  instantaneous acceleration. 
B)  instantaneous velocity. 
C)  average acceleration 
D)  average velocity. 
E)  none of the given answers.

Question 11

An airplane increases its speed from 100 m/s to 160 m/s, at the average rate of 15 m/s2. How much time does it take for the complete increase in speed?

Accepted Answer

A)  17.3 s 
B)  0.0577 s 
C)  4.0 s 
D)  8.0 s 
E)  0.25 s 
A)  17.3 s 
B)  0.0577 s 
C)  4.0 s 
D)  8.0 s 
E)  0.25 s

Question 12

Refer to Figure 2-7:
Figure 2-7
  
During the first 8 s

Accepted Answer

A)  D is speeding up while C is slowing down 
B)  their accelerations are equal in magnitude, but opposite in sign. 
C)  their accelerations are equal in magnitude, and equal in sign. 
D)  the magnitude of the acceleration of C is greater than the magnitude of the acceleration of D. 
E)  the magnitude of the acceleration of D is greater than the magnitude of the acceleration of C. 
A)  D is speeding up while C is slowing down 
B)  their accelerations are equal in magnitude, but opposite in sign. 
C)  their accelerations are equal in magnitude, and equal in sign. 
D)  the magnitude of the acceleration of C is greater than the magnitude of the acceleration of D. 
E)  the magnitude of the acceleration of D is greater than the magnitude of the acceleration of C.

Question 13

-Refer to Figure 2-10. If you start from the Bakery, travel to the Art Gallery, and then to the Cafe, in 1.0 hour, what is your average speed?

Accepted Answer

A)  4.0 km/hr 
B)  6.5 km/hr 
C)  9.0 km/hr 
D)  2.5 km/hr 
E)  10.5 km/hr 
A)  4.0 km/hr 
B)  6.5 km/hr 
C)  9.0 km/hr 
D)  2.5 km/hr 
E)  10.5 km/hr

Question 14

A ball is released moving straight up at 15. m/s. At some time later it is falling downward at 15. m/s. What was the magnitude of its average velocity over this time period?

Accepted Answer

A)  30. m/s 
B)  22. m/s 
C)  0. m/s 
D)  7.5 m/s 
E)  15. m/s 
A)  30. m/s 
B)  22. m/s 
C)  0. m/s 
D)  7.5 m/s 
E)  15. m/s

Question 15

Denis swims the length of a 40. meter pool in 10. seconds and immediately swims back to the starting position in another 15. seconds. What was his average speed?

Accepted Answer

The answer of Denis swims the length of a 40....

Question 16

An object released from rest experiences free fall.

Accepted Answer

A) True 
 B)False

Question 17

When an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion?

Accepted Answer

A)  Neither its acceleration nor its velocity is constant. 
B)  Both its acceleration and its velocity are constant. 
C)  Its acceleration is constant. 
D)  Its velocity is constant. 
A)  Neither its acceleration nor its velocity is constant. 
B)  Both its acceleration and its velocity are constant. 
C)  Its acceleration is constant. 
D)  Its velocity is constant.

Question 18

A can, after having been given a kick, moves up along a smooth hill of ice. It will

Accepted Answer

A)  have a constant acceleration up the hill, but a smaller constant acceleration when it comes back down the hill. 
B)  have a constant acceleration up the hill, but a larger constant acceleration when it comes back down the hill. 
C)  have the same acceleration, both up the hill and down the hill. 
D)  have a varying acceleration along the hill. 
E)  travel at constant velocity. 
A)  have a constant acceleration up the hill, but a smaller constant acceleration when it comes back down the hill. 
B)  have a constant acceleration up the hill, but a larger constant acceleration when it comes back down the hill. 
C)  have the same acceleration, both up the hill and down the hill. 
D)  have a varying acceleration along the hill. 
E)  travel at constant velocity.

Question 19

The graph in Figure 2-6 plots the velocity of two cars (A and B) along the same straight road.
Figure 2-6
 
Which car reverses direction?

Accepted Answer

A)  Car A 
B)  insufficient information 
C)  Car B 
D)  both cars A & B 
E)  neither car A nor B 
A)  Car A 
B)  insufficient information 
C)  Car B 
D)  both cars A & B 
E)  neither car A nor B

Question 20

Explain the relationship between velocity and acceleration.

Accepted Answer

Acceleration is the

Exam 2: Kinematics: Description of Motion

Explain how a POSITIVE acceleration could produce a DECELERATION.

Which physical unit is the SI acceleration of gravity?

A new car manufacturer advertises that their car can go "from zero to sixty in 8 s." This is a description of

The slope of a tangent line at a given time value on a velocity versus time graph gives

Contrast Aristotle's predictions concerning free-falling bodies with Galileo's predictions.

-Refer to Figure 2-10. If you start from the Bakery, travel to the Cafe, and then to the Art Gallery, what is the distance you have traveled?

Jane walks 31 steps eastward and 16 steps southward. What is her displacement if each step averages 0.82 meters?

Which graph in Figure 2-4 represents constant positive acceleration? Figure 2-4

A car starts from rest and accelerates uniformly at 3 m/s2. A second car starts from rest 6 s later at the same point and accelerates uniformly at 5 m/ s2. How long does it take the second car to overtake the first car?

The slope of a line connecting two points on a velocity versus time graph gives

An airplane increases its speed from 100 m/s to 160 m/s, at the average rate of 15 m/s2. How much time does it take for the complete increase in speed?

Refer to Figure 2-7: Figure 2-7 During the first 8 s

-Refer to Figure 2-10. If you start from the Bakery, travel to the Art Gallery, and then to the Cafe, in 1.0 hour, what is your average speed?

A ball is released moving straight up at 15. m/s. At some time later it is falling downward at 15. m/s. What was the magnitude of its average velocity over this time period?

Denis swims the length of a 40. meter pool in 10. seconds and immediately swims back to the starting position in another 15. seconds. What was his average speed?

An object released from rest experiences free fall.

When an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion?

A can, after having been given a kick, moves up along a smooth hill of ice. It will

The graph in Figure 2-6 plots the velocity of two cars (A and B) along the same straight road. Figure 2-6 Which car reverses direction?

Explain the relationship between velocity and acceleration.

Measurement and Problem Solving

Motion in Two Dimensions

Force and Motion

Work and Energy

Linear Momentum and Collisions

Circular Motion and Gravitation

Rotational Motion and Equilibrium

Solids and Fluids

Temperature and Kinetic Theory

Heat

Thermodynamics

Vibrations and Waves

Sound

Electric Charge, Forces, and Fields

Electric Potential, Energy, and Capacitance

Electric Current and Resistance

Basic Electric Circuits

Magnetism

Electromagnetic Induction and Waves

AC Circuits

Reflection and Refraction of Light

Mirrors and Lenses

Physical Optics: The Wave Nature of Light

Vision and Optical Instruments

Relativity

Quantum Physics

Quantum Mechanics and Atomic Physics

The Nucleus

Nuclear Reactions and Elementary Particles

Filters

A car starts from rest and accelerates uniformly at 3 m/s². A second car starts from rest 6 s later at the same point and accelerates uniformly at 5 m/ s². How long does it take the second car to overtake the first car?

An airplane increases its speed from 100 m/s to 160 m/s, at the average rate of 15 m/s². How much time does it take for the complete increase in speed?