# Physics Pre-test

40 Questions | Total Attempts: 1610  Settings  This is the Physics Pre-test.

• 1.
100mL is equal to
• A.

1kL

• B.

10-6 µL

• C.

0.1 L

• D.

0.01 ML

• 2.
The linear momentum of a particle is the product of its mass and its velocity.  Consequently, the SI units of linear momentum
• A.

Kg/ (m/s)

• B.

Kg · m · s

• C.

kg · m/s

• D.

None of these

• 3.
Newtow’s law of gravitation is an inverse-square law. When separated by a distance d, two unlike charges exert mutual attractive forces of magnitude F on each other.  If the separation distance between these charges are doubled, how strong are the mutual forces now?
• A.

F/4

• B.

F/2

• C.

2F

• D.

4F

• 4.
An astronaut weighs 80N on earth where the acceleration due to gravity is approximately 10 m/s2. The mass of the astronaut at a point in space where the acceleration due to gravity is 4 m/s2 is roughly
• A.

80 kg

• B.

32 kg

• C.

20 kg

• D.

8 kg

• 5.
Copper is a better conductor than paper. Relative to the resistance of a sample of copper, the resistance of an identically shaped sample of paper is
• A.

Larger

• B.

The same

• C.

Smaller

• D.

None of these

• 6.
If an object has a constant velocity, then it:
• A.

Moves with unchanging speed in a straight line.

• B.

Moves with unchanging speed along a circle.

• C.

Does not move at all.

• D.

Either A or C.

• 7.
The SI prefix ‘milli’ means
• A.

10^-6

• B.

10^+3

• C.

10^-3

• D.

10^+6

• 8.
Which of the following is not an SI base quantity?
• A.

Length

• B.

Mass

• C.

Weight

• D.

Time

• 9.
The unit of mass in the SI system
• A.

Pound

• B.

Gram

• C.

Kilogram

• D.

None of these

• 10.
The metric prefix for 1/1000
• A.

Centi

• B.

Kilo

• C.

Micro

• D.

None of these

• 11.
One milliliter is equal to one
• A.

Cubic decimeter

• B.

Cubic centimeter

• C.

Cubic meter

• D.

None of these

• 12.
In terms of fundamental SI units, one newton is
• A.

1 kg · m^2/s^2

• B.

1 kg · m^2/s

• C.

1 kg · m/s^2

• D.

None of these

• 13.
Two charged particles attract each other with a force of 1.0 N. If the magnitude of each charge is doubled and the distance between them is unchanged, the force will be
• A.

4.0 N

• B.

0.5 N

• C.

1.0 N

• D.

0.25 N

• 14.
Which of the following bodies has the largest kinetic energy?
• A.

Mass 2M with speed 3V

• B.

Mass 3M with speed 2V

• C.

Mass M with speed 4V

• D.

Mass 3M with speed V

• 15.
When an object thrown vertically upwards reaches its maximum height, it has
• A.

Zero acceleration and zero velocity

• B.

Zero acceleration and negative velocity

• C.

Negative acceleration and zero velocity

• D.

Negative acceleration and negative velocity

• 16.
A battery of 3.0 V is placed across a wire of a 5.0 W lamp. The resulting current in the wire is
• A.

0.60 A

• B.

15 A

• C.

60 A

• D.

125 A

• 17.
An object attached to one end of a spring makes 20 vibrations in 10 seconds. The period of the object is
• A.

2 Hz

• B.

2 seconds

• C.

0.5 seconds

• D.

0.5 Hz

• 18.
How many nanometers are there in one meter?
• A.

10^-9

• B.

10^+3

• C.

10^-3

• D.

10^+9

• 19.
A kilowatt-hour is a unit of:
• A.

Time

• B.

Power

• C.

Energy

• D.

Voltage

• 20.
Which of the following has three significant figures?
• A.

305.0 cm

• B.

1.00081 kg

• C.

0.0500 mm

• D.

8.060 x 1011 m^2

• 21.
An apple falls from a tree.  Compare its kinetic energy, K, to its potential energy, U.
• A.

K decreases and U decreases

• B.

K is constant and U increases

• C.

K increases and U decreases

• D.

K increases and U is constant

• 22.
The resistance of an object to changes in motion
• A.

Acceleration

• B.

Density

• C.

Inertia

• D.

None of these

• 23.
The amount of space an object takes up
• A.

Density

• B.

Speed

• C.

Mass

• D.

None of these

• 24.
Distance traveled in a period of time
• A.

Motion

• B.

Acceleration

• C.

Speed

• D.

None of these

• 25.
W hich of these is the independent variable in a distance-time graph
• A.

Time

• B.

Distance

• C.

Speed

• D.

None of these

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