Question 1

Discuss the differences between distance and displacement.

Accepted Answer

Distance is the total path length traver

Question 2

-Figure 2-13 represents the velocity of a particle as it travels along the x-axis. What is the average acceleration of the particle between t = 1 second and t = 4 seconds?

Accepted Answer

A)  3.5 m/s2 
B)  2.0 m/ s2 
C)  2.5 m/ s2 
D)  1.7 m/ s2 
E)  0.33 m/ s2 
A)  3.5 m/s2 
B)  2.0 m/ s2 
C)  2.5 m/ s2 
D)  1.7 m/ s2 
E)  0.33 m/ s2

Question 3

The "acceleration of gravity" is 9.8 m/s2 everywhere on the surface of the Earth.

Accepted Answer

A) True 
 B)False

Question 4

Is it possible for the magnitude of displacement to be greater than the distance traveled.

Accepted Answer

A) True 
 B)False

Question 5

Suppose that a Ferrari and a Porsche begin a race with a moving start, and each moves with constant speed. One lap of the track is 2 km. The Ferrari laps the Porsche after the Porsche has completed 9 laps. If the speed of the Ferrari had been 10 km/h less, the Porsche would have traveled 18 laps before being overtaken. What were the speeds of the two cars?

Accepted Answer

Porsche speed = 180

Question 6

Use the Figure 2-12 below to answer the following question(s).
  
-At t = 0 s

Accepted Answer

A)  rider C is ahead of rider D. 
B)  riders C and D are at the same position. 
C)  rider D is moving faster than rider C. 
D)  rider D is ahead of rider C. 
E)  rider D is moving slower than rider C. 
A)  rider C is ahead of rider D. 
B)  riders C and D are at the same position. 
C)  rider D is moving faster than rider C. 
D)  rider D is ahead of rider C. 
E)  rider D is moving slower than rider C.

Question 7

When a ball is thrown straight up, which of the following is zero at its highest point?

Accepted Answer

A)  displacement 
B)  acceleration 
C)  velocity 
A)  displacement 
B)  acceleration 
C)  velocity

Question 8

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

Accepted Answer

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

Question 9

A bullet shot straight up returns to its starting point in 10 s. Its initial speed was

Accepted Answer

A)  49 m/s. 
B)  9.8 m/s. 
C)  98 m/s. 
D)  32. ft/s. 
E)  24.5 m/s. 
A)  49 m/s. 
B)  9.8 m/s. 
C)  98 m/s. 
D)  32. ft/s. 
E)  24.5 m/s.

Question 10

A car starting from rest moves with constant acceleration of 2 m/s2 for 10 s, then travels with constant speed for another 10 s, and then finally slows to a stop with constant acceleration of -2 m/s2. How far does it travel?

Accepted Answer

A)  200 m 
B)  100 m 
C)  300 m 
D)  400 m 
E)  500 m 
A)  200 m 
B)  100 m 
C)  300 m 
D)  400 m 
E)  500 m

Question 11

In a 400-m relay race the anchorman (the person who runs the last 100 m) for the Trojans can run 100 m in 9.8 s. His rival, the anchorman for the Bruins, can cover 100 m in 10.1 s. What is the largest lead the Bruin runner can have when the Trojan runner starts the final leg of the race, in order for the Trojan runner not to lose the race?

Accepted Answer

The answer of In a 400-m relay race the anchorman...

Question 12

Consider a heavy object which is thrown straight up, reaches its highest point, and then falls back down to the ground. During what parts of the trajectory was it in "FREE FALL"? (assume here that air friction is negligible)

Accepted Answer

During its entire travel durin

Question 13

For constant linear acceleration, the velocity versus time graph is a

Accepted Answer

A)  horizontal line. 
B)  sloped line. 
C)  curve. 
D)  vertical line. 
E)  none of the given answers. 
A)  horizontal line. 
B)  sloped line. 
C)  curve. 
D)  vertical line. 
E)  none of the given answers.

Question 14

A vector quantity is described by both a magnitude and a direction.

Accepted Answer

A) True 
 B)False

Question 15

If you run a complete loop around an outdoor track (400 m) in 100 s, your average velocity is

Accepted Answer

A)  4.0 m/s. 
B)  40,000 m/s. 
C)  4.00 km/s. 
D)  0.25 m/s. 
E)  zero. 
A)  4.0 m/s. 
B)  40,000 m/s. 
C)  4.00 km/s. 
D)  0.25 m/s. 
E)  zero.

Question 16

Can an object's velocity change direction when its acceleration is constant?

Accepted Answer

A)  No, this is not possible because it is always slowing up. 
B)  No, this is not possible because it is always speeding up. 
C)  Yes, this is possible, and a car that starts from rest, speeds up, slows to a stop, and then backs up is an example. 
D)  Yes, this is possible, and a rock thrown straight up is an example. 
E)  No, this is not possible because it is always speeding up or always slowing down, but it can never turn around. 
A)  No, this is not possible because it is always slowing up. 
B)  No, this is not possible because it is always speeding up. 
C)  Yes, this is possible, and a car that starts from rest, speeds up, slows to a stop, and then backs up is an example. 
D)  Yes, this is possible, and a rock thrown straight up is an example. 
E)  No, this is not possible because it is always speeding up or always slowing down, but it can never turn around.

Question 17

A car is able to stop in a distance d. Assuming the same braking force, what distance does this car require to stop when it is traveling twice as fast?

Accepted Answer

A)  4 d 
B)  d 
C)    d 
D)  2   d 
E)  2 d 
A)  4 d 
B)  d 
C)    d 
D)  2   d 
E)  2 d

Question 18

If you run a complete loop around an outdoor track (400 m) in 100 s, your average speed is

Accepted Answer

A)  4.0 mph. 
B)  0.40 m/s. 
C)  40000. m/s. 
D)  4.0 km/h. 
E)  4.0 m/s. 
A)  4.0 mph. 
B)  0.40 m/s. 
C)  40000. m/s. 
D)  4.0 km/h. 
E)  4.0 m/s.

Question 19

An auto accelerates from 7.0 m/s at 0.71 m/s2. It travels a distance of 1.033 km while accelerating.
(a) What is the final speed at the end of that displacement?
(b) How many seconds did it take to accelerate from 7.0 m/s?

Accepted Answer

(a) 39. m/

Question 20

A motorist travels for 3.0 h at 80 km/h and 4.0 h at 60 km/h. What is her average speed for the trip?

Accepted Answer

A)  69 km/h 
B)  70 km/h 
C)  74 km/h 
D)  140 km/h 
E)  73 km/h 
A)  69 km/h 
B)  70 km/h 
C)  74 km/h 
D)  140 km/h 
E)  73 km/h

Exam 2: Kinematics: Description of Motion

Discuss the differences between distance and displacement.

-Figure 2-13 represents the velocity of a particle as it travels along the x-axis. What is the average acceleration of the particle between t = 1 second and t = 4 seconds?

The "acceleration of gravity" is 9.8 m/s2 everywhere on the surface of the Earth.

Is it possible for the magnitude of displacement to be greater than the distance traveled.

Use the Figure 2-12 below to answer the following question(s). -At t = 0 s

When a ball is thrown straight up, which of the following is zero at its highest point?

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

A bullet shot straight up returns to its starting point in 10 s. Its initial speed was

A car starting from rest moves with constant acceleration of 2 m/s2 for 10 s, then travels with constant speed for another 10 s, and then finally slows to a stop with constant acceleration of -2 m/s2. How far does it travel?

Consider a heavy object which is thrown straight up, reaches its highest point, and then falls back down to the ground. During what parts of the trajectory was it in "FREE FALL"? (assume here that air friction is negligible)

For constant linear acceleration, the velocity versus time graph is a

A vector quantity is described by both a magnitude and a direction.

If you run a complete loop around an outdoor track (400 m) in 100 s, your average velocity is

Can an object's velocity change direction when its acceleration is constant?

A car is able to stop in a distance d. Assuming the same braking force, what distance does this car require to stop when it is traveling twice as fast?

If you run a complete loop around an outdoor track (400 m) in 100 s, your average speed is

An auto accelerates from 7.0 m/s at 0.71 m/s2. It travels a distance of 1.033 km while accelerating. (a) What is the final speed at the end of that displacement? (b) How many seconds did it take to accelerate from 7.0 m/s?

A motorist travels for 3.0 h at 80 km/h and 4.0 h at 60 km/h. What is her average speed for the trip?

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

The "acceleration of gravity" is 9.8 m/s² everywhere on the surface of the Earth.

A car starting from rest moves with constant acceleration of 2 m/s² for 10 s, then travels with constant speed for another 10 s, and then finally slows to a stop with constant acceleration of -2 m/s². How far does it travel?

An auto accelerates from 7.0 m/s at 0.71 m/s². It travels a distance of 1.033 km while accelerating. (a) What is the final speed at the end of that displacement? (b) How many seconds did it take to accelerate from 7.0 m/s?