Name:    Practice Test 1B

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

1.

A moving billiard ball collides with an identical stationary one.  Which statement correctly describes what happens to the first ball after collision?
 A) It continues with the same velocity as before B) It has one-half of its initial velocity C) It comes to rest D) It moves in the opposite direction

2.

The unit of force in the SI system is
 A) kg-m2/s B) kg-m/s2 C) kg-m2/s2 D) kg-m/s

3.

A 100 mg pill has a mass of
 A) 0.001 g B) 0.01 g C) 0.1 g D) 1 g

4.

Which of the following quantities is NOT a vector?
 A) displacement B) acceleration C) speed D) force

5.

An object moving with a velocity of 20 m/s undergoes an acceleration of –4 m/s2.  After 2 seconds, the velocity of the object is
 A) 16 m/s B) 12 m/s C) 28 m/s D) –8 m/s

6.

Which of the following statements best describes science?
 A) Science discovers and corrects its own mistakes. B) Science is a glorious entertainment. C) Science is concerned with facts which are absolutely true. D) Science is concerned with collecting and classifying as many facts as possible.

7.

The radius of the earth is 6.38 x 103 km.  This value can also be expressed as
 A) 6.38 x 10 –5 m B) 6.38 x 106 m C) 6.38 x 105 m D) 638 km

8.

A net force of 20 N acts on an object and causes it to experience an acceleration of 10 m/s2.  The object’s mass is
 A) 10 kg B) 100 kg C) 0.5 kg D) 2 kg

9.

The Law of Universal Gravitation states that the force between two bodies is
 A) inversely proportional to the square of the distance between the bodies. B) directly proportional to the distance between the bodies. C) inversely proportional to the distance between the bodies. D) inversely proportional to their masses.

10.

If a body is moving at constant velocity, it must have
 A) constant acceleration B) a constant force acting upon it C) constant speed D) all of the above

11.

Normal body temperture is 98.6 °F.  What is this temperature in degrees Celsius?
 A) 22.8 °C B) 54.8 °C C) 37.0 °C D) 66.6 °C

12.

An object that has twice as much mass as another also has twice as much
 A) acceleration B) area C) weight D) volume

13.

The correct answer for the operation below is:

 A) 2.0 B) 2.0 x 10 –16 C) 2.0 x 100 D) 2.0 x 1016

14.

Acceleration refers to
 A) how much the velocity changes B) how much the speed changes C) how fast the velocity changes D) how fast an object is moving

15.

An object is dropped from rest.  In one second of free fall it would have traveled about
 A) 98 m B) 5 m C) 10 m D) 15 m