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Phys Sci Ch 15 A
Test Description: Energy
Instructions: Answer all questions to get your test result.
1) Work is a transfer of
A
mass
B
force
C
energy
2) What is transferred by a force moving an object through a distance?
A
energy
B
force
C
motion
3) The energy of motion is called
A
kinetic energy
B
potential energy
C
thermal energy
4) A small 20 kg canoe is floating downriver at a speed of 2 m/s. What is the canoe's kinetic energy?
A
80J
B
40J
C
22J
5) A 13 kg sled is moving at a speed of 3.0m/s. At which of the following speeds will the sled have twice as much kinetic energy?
A
4.2 m/s
B
6 m/s
C
1.5 m/s
6) An object's gravitational potential energy is NOT directly related to which of the following?
A
its speed
B
its mass
C
its height relative to a reference level
7) Which of the following is an example of an object with elastic potential energy?
A
a stretched rubber band
B
all of the above
C
a compressed basketball
8) Why is the gravitational potential energy of an object 1 m above the moon's surface less than its potential energy 1 m above Earth's surface?
A
The object's acceleration due to gravity is less on the moon
B
The object's mass is less on the moon
C
The object's weight is more on the moon
9) A 4 kg cat is resting on top of a bookshelf that is 3 m high. What is the cat's gravitational potential energy relative to the floor if the acceleration due to gravity is 9.8 m/s2?
A
12 J
B
118 J
C
7 J
10) The gravitational potential energy of an object is always measured relative to the
A
position of maximum mechanical energy
B
reference level from which the height is measured
C
location where the object's kinetic energy is zero
11) Which of the following increases when an object becomes warmer?
A
nuclear energy
B
thermal energy
C
elastic potential energy
12) The energy stored in gasoline is
A
electromagnetic energy
B
chemical energy
C
mechanical energy
13) The total potential and kinetic energy of all the microscopic particles in an object make up its
A
chemical energy
B
thermal energy
C
nuclear energy
14) Walking converts what type of energy into mechanical energy?
A
nuclear
B
chemical
C
electromagnetic
15) Nuclear power plants are designed to convert nuclear energy into what type of energy?
A
geothermal
B
electrical
C
chemical
16) Solar cells convert what type of energy into electrical energy?
A
nuclear
B
electromagnetic
C
chemical
17) Which of the following statements is true according to the law of conservation of energy?
A
all of the above
B
energy cannot be destroyed
C
energy can be converted from one form to another
18) If no friction acts on a diver during a dive, then which of the following statements is true?
A
potential energy can be converted into kinetic energy but not vice versa
B
the total mechanical of the system increases
C
(KE + PE)before = (KE + PE)after
19) The mechanical energy of an object equals its
A
nuclear energy
B
kinetic energy plus its potential energy
C
chemical energy plus its nuclear energy
*select an answer for all questions
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