Question 1

A bullet moving at 244. m/s strikes a tree and penetrates a distance of 8.34 mm before stopping. What was the average acceleration of the bullet as it slowed?

Accepted Answer

-3.57 × 10⁶ m/s

Question 2

In the formula v2 = vo2 + 2 a x, what does x represent?

Accepted Answer

The CHANGE in POSITION, which is NOT necessarily the distance gone.

Question 3

Use the Figure 2-12 below to answer the following question(s).
  
-At t = 10 s

Accepted Answer

A)  C is in front of D. 
B)  C and D are at the same position. 
C)  the velocity of D is greater than the velocity of C. 
D)  D is in front of C. 
E)  C and D have the same velocity. 
A)  C is in front of D. 
B)  C and D are at the same position. 
C)  the velocity of D is greater than the velocity of C. 
D)  D is in front of C. 
E)  C and D have the same velocity. B

Question 4

Which physical unit is a displacement?

Accepted Answer

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

Question 5

Captain Rickard orders his starship to accelerate from rest at a rate of "1g" (accel = 9.8 m/s2). How long does it take the starship to reach one-tenth the speed of light if light travels 300. megameters/s?

Accepted Answer

Question 6

When a ball is thrown straight up, the acceleration at its highest point is

Accepted Answer

A)  horizontal. 
B)  minimum. 
C)  downward. 
D)  zero. 
E)  upward. 
A)  horizontal. 
B)  minimum. 
C)  downward. 
D)  zero. 
E)  upward.

Question 7

Consider a mass initially moving at 7.50 m/s.
(a) How long does it take to move 3.5 km if it accelerates at 0.550 m/s2?
(b) How fast is it moving after this acceleration?

Accepted Answer

(a) 100. s

Question 8

All of the following are scalars, except

Accepted Answer

A)  time. 
B)  force. 
C)  temperature. 
D)  distance. 
E)  mass. 
A)  time. 
B)  force. 
C)  temperature. 
D)  distance. 
E)  mass.

Question 9

A car traveling 60 km/h accelerates at the rate of 4.0 m/s2. How much time is required for the car to reach a speed of 90 km/h?

Accepted Answer

Question 10

Speed indicates how fast something is moving and in which direction it is moving.

Accepted Answer

A) True 
 B)False

Question 11

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

Accepted Answer

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

Question 12

The acceleration due to gravity has the same value for all free-falling objects, regardless of their mass or weight.

Accepted Answer

A) True 
 B)False

Question 13

Which physical unit is a velocity?

Accepted Answer

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

Question 14

Jane 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 her average velocity?

Accepted Answer

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

Question 15

A bullet moving at 244. m/s strikes a tree and penetrates a distance of 8.34 mm before stopping. Assuming a constant acceleration, how long did it take the bullet to stop?

Accepted Answer

The answer of A bullet moving at 244. m/s strikes...

Question 16

A car decelerates uniformly and comes to a stop after 10 s. The car's average velocity during deceleration was 50 km/h. What was the car's deceleration while slowing down?

Accepted Answer

A)  10 km/h-s 
B)  5 km/h-s 
C)  9.8 m/s2  
D)  4 km/h-s 
E)  8 km/h-s 
A)  10 km/h-s 
B)  5 km/h-s 
C)  9.8 m/s2  
D)  4 km/h-s 
E)  8 km/h-s

Question 17

It is possible to have constant speed, but still be accelerating.

Accepted Answer

A) True 
 B)False

Question 18

Which graph in Figure 2-2 represents a constant non-zero velocity?
Figure 2-2

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 19

An object is thrown vertically and accelerates downward at +9.80 m/s2 (downward is positive and upward is negative) 
(a) What is its displacement after 5.00 s if it starts at 2.50 m/s?
(b) How fast is it moving after that 5.00 s?

Accepted Answer

(a) 135. m

Question 20

Which graph(s) in Figure 2-3 represent(s) zero acceleration?

Accepted Answer

A)  only a 
B)  only b 
C)  a and b 
D)  b and c 
E)  c and d 
A)  only a 
B)  only b 
C)  a and b 
D)  b and c 
E)  c and d

Exam 2: Kinematics: Description of Motion

A bullet moving at 244. m/s strikes a tree and penetrates a distance of 8.34 mm before stopping. What was the average acceleration of the bullet as it slowed?

In the formula v2 = vo2 + 2 a x, what does x represent?

Use the Figure 2-12 below to answer the following question(s). -At t = 10 s

Which physical unit is a displacement?

Captain Rickard orders his starship to accelerate from rest at a rate of "1g" (accel = 9.8 m/s2). How long does it take the starship to reach one-tenth the speed of light if light travels 300. megameters/s?

When a ball is thrown straight up, the acceleration at its highest point is

Consider a mass initially moving at 7.50 m/s. (a) How long does it take to move 3.5 km if it accelerates at 0.550 m/s2? (b) How fast is it moving after this acceleration?

All of the following are scalars, except

A car traveling 60 km/h accelerates at the rate of 4.0 m/s2. How much time is required for the car to reach a speed of 90 km/h?

Speed indicates how fast something is moving and in which direction it is moving.

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

The acceleration due to gravity has the same value for all free-falling objects, regardless of their mass or weight.

Which physical unit is a velocity?

Jane 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 her average velocity?

A bullet moving at 244. m/s strikes a tree and penetrates a distance of 8.34 mm before stopping. Assuming a constant acceleration, how long did it take the bullet to stop?

A car decelerates uniformly and comes to a stop after 10 s. The car's average velocity during deceleration was 50 km/h. What was the car's deceleration while slowing down?

It is possible to have constant speed, but still be accelerating.

Which graph in Figure 2-2 represents a constant non-zero velocity? Figure 2-2

An object is thrown vertically and accelerates downward at +9.80 m/s2 (downward is positive and upward is negative) (a) What is its displacement after 5.00 s if it starts at 2.50 m/s? (b) How fast is it moving after that 5.00 s?

Which graph(s) in Figure 2-3 represent(s) zero 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

In the formula v² = v_o² + 2 a x, what does x represent?

Captain Rickard orders his starship to accelerate from rest at a rate of "1g" (accel = 9.8 m/s²). How long does it take the starship to reach one-tenth the speed of light if light travels 300. megameters/s?

Consider a mass initially moving at 7.50 m/s. (a) How long does it take to move 3.5 km if it accelerates at 0.550 m/s²? (b) How fast is it moving after this acceleration?

A car traveling 60 km/h accelerates at the rate of 4.0 m/s². How much time is required for the car to reach a speed of 90 km/h?

An object is thrown vertically and accelerates downward at +9.80 m/s² (downward is positive and upward is negative) (a) What is its displacement after 5.00 s if it starts at 2.50 m/s? (b) How fast is it moving after that 5.00 s?