Multiple Choice Identify the
letter of the choice that best completes the statement or answers the question.


1.

A car traveling at 20 m/s decelerates at the rate of 4 m/s^{2}.
After 2 seconds the speed of the car is
A)  28 m/s  B)  16 m/s  C)  12
m/s  D)   8 m/s 


2.

A jogger runs 4 km east, 6 km south, 8 km west and 6 km north. What is the
magnitude of the jogger’s displacement?
A)  8 km  B)  24 km  C)  4
km  D)  16 km 


3.

A moving object will travel in a circle if acted upon by a force
A)  opposite to its direction of motion.  B)  perpendicular to its direction of
motion.  C)  in its direction of motion.  D)  tangent to its circular
path. 


4.

Newton’s third law is a statement of the law of
A)  gravitation  B)  inertia  C)  force  D)  actionreaction 


5.

A scientific model
A)  must be changed annually.  B)  is a useful conceptual
tool.  C)  is a representation of ultimate reality.  D)  is constructed of
sticks of balls. 


6.

A net force is acting on a body; therefore the body is
A)  being accelerated.  B)  losing mass.  C)  moving with a
constant velocity.  D)  at rest. 


7.

How many kg are there in 1 mg?
A)  1x10^{6} kg  B)  1x10^{6} kg  C)  1000
kg  D)  1x10^{3} kg 


8.

A car traveling at 30 m/s is brought to stop in 5 seconds. What is the
car’s acceleration?
A)  150 m/s^{2}  B)  –6 m/s^{2}  C)  6
m/s^{2}  D)  30 m/s^{2} 


9.

The measurement 0.00630 cm has how many significant figures?


10.

An object with a mass of 25 kg is acted upon by a force of 10 N. The
object’s acceleration is
A)  0.4 m/s^{2}  B)  35 m/s^{2}  C)  250
m/s^{2}  D)  2.5 m/s^{2} 


11.

Ethyl alcohol has a density of 0.789 g/mL. What is the mass of 250
mL of this alcohol?
A)  250 g  B)  317 g  C)  171
g  D)  197 g 


12.

The temperature of 77 F is what temperature in Celsius?


13.

Which of the following is not a vector?
A)  displacement  B)  speed  C)  acceleration  D)  velocity 


14.

For an object in free fall,
A)  the distance increases uniformly with time.  B)  the acceleration
increases uniformly with time.  C)  the velocity increases uniformly with
time.  D)  none of the above is true 


15.

The gravity of planet X is three times that on the earth. What mass would
an object have on planet X if its mass is 5 kg on earth?
A)  45 kg  B)  15 kg  C)  135
kg  D)  5 kg 
