Question 1

Discuss whether a car speedometer measures instantaneous speed or an average speed.

Accepted Answer

One desires it to display instantaneous

Question 2

Which physical unit represents acceleration in the British system?

Accepted Answer

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

Question 3

If an object is accelerating, it must therefore undergo

Accepted Answer

A)  a change in speed. 
B)  a change in direction. 
C)  a change in velocity. 
A)  a change in speed. 
B)  a change in direction. 
C)  a change in velocity.

Question 4

Eric watches a jet powered truck during an "air-show." It accelerates from rest to 300. mph in 8.0 seconds. The acceleration was equivalent to how many "g's"?

Accepted Answer

The answer of Eric watches a jet powered truck during...

Question 5

A race car circles 10 times around an 8-km track in 20 min. What is its average velocity per lap?

Accepted Answer

Average la

Question 6

Suppose that an object is moving with constant acceleration. Which of the following is an accurate statement concerning its motion?

Accepted Answer

A)  In equal times its velocity changes by equal amounts. 
B)  In equal times it moves equal distances. 
C)  In equal times its speed increases by equal amounts. 
A)  In equal times its velocity changes by equal amounts. 
B)  In equal times it moves equal distances. 
C)  In equal times its speed increases by equal amounts.

Question 7

Use the Figure 2-12 below to answer the following question(s).
  
-At t = 1 s

Accepted Answer

A)  D has a greater velocity than C. 
B)  C and D have the same velocity. 
C)  D is accelerating. 
D)  C is accelerating. 
E)  C has a greater velocity than D. 
A)  D has a greater velocity than C. 
B)  C and D have the same velocity. 
C)  D is accelerating. 
D)  C is accelerating. 
E)  C has a greater velocity than D.

Question 8

An astronaut on a strange new planet finds that she can jump up to a maximum height of 27. meters when her initial upward speed is 6.0 m/s. What is the magnitude of the acceleration of gravity on the planet?

Accepted Answer

The answer of An astronaut on a strange new planet...

Question 9

Suppose that an object travels from one point in space to another. Make a comparison between the displacement and the distance traveled.

Accepted Answer

A)  The displacement can be either greater than, smaller than, or equal to the distance traveled. 
B)  The displacement is either greater than or equal to the distance traveled. 
C)  The displacement is either less than or equal to the distance traveled. 
D)  The displacement is always equal to the distance traveled. 
A)  The displacement can be either greater than, smaller than, or equal to the distance traveled. 
B)  The displacement is either greater than or equal to the distance traveled. 
C)  The displacement is either less than or equal to the distance traveled. 
D)  The displacement is always equal to the distance traveled.

Question 10

Which graph in Figure 2-1 represents an object at rest?
Figure 2-1

Accepted Answer

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

Question 11

-Refer to Figure 2-11. 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)  4.0 km South 
C)  2.5 km South 
D)  9.0 km North 
E)  10.5 km North 
A)  6.5 km South 
B)  4.0 km South 
C)  2.5 km South 
D)  9.0 km North 
E)  10.5 km North

Question 12

A car with good tires on a dry road can decelerate at about 5 m/s2 when braking. If the car is traveling at 89. km/h:
(a) how long does it take the car to stop under these conditions? 
(b) how far does the car travel during this time?

Accepted Answer

(a) 4.9 s

Exam 2: Kinematics: Description of Motion

Discuss whether a car speedometer measures instantaneous speed or an average speed.

Which physical unit represents acceleration in the British system?

If an object is accelerating, it must therefore undergo

Eric watches a jet powered truck during an "air-show." It accelerates from rest to 300. mph in 8.0 seconds. The acceleration was equivalent to how many "g's"?

A race car circles 10 times around an 8-km track in 20 min. What is its average velocity per lap?

Suppose that an object is moving with constant acceleration. Which of the following is an accurate statement concerning its motion?

Use the Figure 2-12 below to answer the following question(s). -At t = 1 s

An astronaut on a strange new planet finds that she can jump up to a maximum height of 27. meters when her initial upward speed is 6.0 m/s. What is the magnitude of the acceleration of gravity on the planet?

Suppose that an object travels from one point in space to another. Make a comparison between the displacement and the distance traveled.

Which graph in Figure 2-1 represents an object at rest? Figure 2-1

-Refer to Figure 2-11. If you start from the Bakery, travel to the Cafe, and then to the Art Gallery, what is your displacement?

A car with good tires on a dry road can decelerate at about 5 m/s2 when braking. If the car is traveling at 89. km/h: (a) how long does it take the car to stop under these conditions? (b) how far does the car travel during this time?

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 with good tires on a dry road can decelerate at about 5 m/s² when braking. If the car is traveling at 89. km/h: (a) how long does it take the car to stop under these conditions? (b) how far does the car travel during this time?