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Energy, Work, and Power

Total questions: 59

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

units of force are

a)

newtons

b)

grams

c)

joules

d)

meters

2.

units for work are

a)

newtons

b)

joules

c)

meters

d)

seconds

3.

if you push a cart with a force of 60 N for 2 m... how much work have you done

a)

120 J

b)

30 J

c)

120 N

d)

30 N

4.
work transfers
a)
sweat
b)
energy
c)
velocity
d)
effort
5.
What is the formula for work?
a)
Force = work x distance
b)
Distance = force x work
c)
Work = force x distance
d)
Work = force x mass
6.

Fred kicks a ball with a force of 20N to George, who is 5M away. How much work was done to the ball?

a)

25J

b)

100J

c)

4J

d)

75J

7.

If 40N of force is applied to Rollo Koster's 10 kg cart over a distance of 50 meters, how much work is done?

a)

8000J

b)

8000N

c)

4000J

d)

2000J

8.
Energy can not be created or destroyed, only converted from one form to another.
a)
true
b)
false
9.
Force is a _____ or _______
a)
simple    complex
b)
push     pull
c)
up      down
d)
in      out
10.
Which situation is work not done?
a)
lifting a 20 pound box off the floor
b)
holding a 20 pound box above the floor
c)
sliding a 20 pound box across the floor
d)
sliding a 20 pound box up an inclined plane
11.
What is work?
a)
A push or pull.
b)
When the object moves in the same direction in which the force is exerted.
c)
A change in energy.
d)
The rate at which energy is transferred.
12.
Which is doing work?
a)
pushing a wall
b)
holding a box
c)
picking up a pencil
d)
sitting in a chair
13.
Which of the following is the best example of work being done? 
a)
doing homework
b)
lifting a box
c)
pushing a stationary box
d)
holding a box
14.

A machine with a 5-N input force and a 25-N output force has a mechanical advantage of?

a)

2

b)

5

c)

20

d)

125

15.

The mechanical advantage of a pulley system depends upon?

a)

The diameter of the pulley wheels

b)

The length of the rope

c)

The number of sections of rope

d)

The direction of the input force

16.

No machine can be 100% efficient because of

a)

Thermal energy

b)

Waste energy

c)

Convection energy

d)

Friction

17.

Which is not considered a simple machine?

a)

The pump

b)

The wheel & axle

c)

The wedge

d)

The screw

e)

The pulley

18.

Which is not a simple machine?

a)

Wedge

b)

screw

c)

lever

d)

fulcrum

19.

The Mechanical Advantage (MA) of a simple machine makes work

a)

Easier

b)

Harder

c)

No difference to the work done

d)

None Of the above

20.

This is the SI unit for power.

a)

watt

b)

horsepower

c)

watt and/or horsepower

d)

joule

21.

The symbol for power is:

a)

P

b)

p

c)

Po

d)

Watt

22.

The symbol for force is:

a)

the newton

b)

F

c)

W

d)

P

23.

What's the symbol for mechanical advantage?

a)

MA

b)

M

c)

Ma

d)

eff

24.

Which of the following is the symbol for ideal mechanical advantage?

a)

IMA

b)

AMA

c)

MAi

d)

Mima

25.

Which of the following is the symbol for actual mechanical advantage?

a)

AMA

b)

Ama

c)

Mama

d)

MA

26.

What is the symbol for horsepower?

a)

W

b)

hp

c)

h

d)

Php

27.

What's the symbol for work?

a)

W

b)

w

c)

P

d)

p

28.
When is the potential energy the greatest in a roller coaster?
a)
a. at the bottom of the first hill
b)
b. at the top of the first hill
c)
c. at the top of the second hill
d)
d. at the bottom of the second hill
29.

When you eat fruits and vegetables, chemical bonds are releasing stored energy, this is...

a)

a. thermal energy

b)

b. sound energy

c)

c. electrical energy

d)

d. chemical energy

30.
Any time an energy conversion takes place, some of the original energy is converted to which one of the following?
a)
a. sound energy
b)
b. potential energy
c)
c. light energy
d)
d. thermal energy
31.
Which of the following is a conversion from light energy to chemical energy?
a)
a. turning on a stove to heat dinner
b)
b. turning on a lamp
c)
c. growing an apple tree
d)
d. making toast in a toaster
32.
After an energy conversion, you end up with the same total amount of energy as the original amount of potential energy. Which of the following laws explains this rule?
a)
a. law of energy changes
b)
b. law of conservation of energy
c)
c. law of power and energy
d)
d. law of potential energy
33.

The ability to do work

a)

A. chemical energy

b)

B. Friction

c)

C. electrical energy

d)

D. Energy

34.
a.  Energy stored in the nucleus of an atom.
a)
A. Sound Energy
b)
B. Potential Energy
c)
C. Nuclear Energy
d)
D. Thermal energy
35.
The energy of moving electrons
a)
A. Energy
b)
B. Energy Conversion
c)
C. Chemical Energy
d)
D. Electrical Energy
36.
Where is the potential energy the greatest?
a)
A
b)
B
c)
C
d)
D
37.
Energy from light waves.
a)
Radiant Energy 
b)
Chemical Energy 
c)
Nuclear Energy 
d)
Radiation 
38.

A student is holding the end of a pendulum. The student releases the pendulum. What energy transfers are taking place?

a)

potential energy is transferred to kinetic energy

b)

chemical energy to thermal energy

c)

mechanical energy to chemical energy

d)

kinetic energy is tranferred to potential energy

39.
The Gulf Stream is a current that brings warm ocean water from the south to the north.
a)
conduction
b)
convection
c)
radiation
40.
Walking on the warm sand sand with your bare feet.
a)
conduction
b)
convection
c)
radiation
41.
Which direction will the heat flow while this person holds a hot cup of tea?
a)
from the cup to her hand
b)
from her hand to the cup
c)
no heat is transferred
42.
Which direction will the heat flow while this ice cap melts?
a)
there is no heat transfer
b)
from the icecap to the water
c)
from the water to the icecap
43.
In this experiment, the WARM red dye and the COLD blue dye was placed in the water at the same time. The warm red dye rose to the top while the cold blue dye sank to the bottom.
a)
conduction
b)
convection
c)
radiation
44.
Heat transfers from an area of ____temperature to an area of ___ temperature.
a)
high to low
b)
low to high
c)
high to high
45.
High temperature is connected to:
a)
Low kinetic energy.
b)
High kinetic energy.
c)
Zero net energy.
d)
Equal kinetic energies.
46.
What is thermodynamics?
a)
movement of heat
b)
it's magic
c)
measurement of heat
d)
none of them
47.
Energy due to motion is ____________ energy. 
a)
Potential 
b)
Energy
c)
Kinetic
d)
Friction
48.

When two identical cars, one traveling twice as fast as the other, brake to a stop using old-fashioned brakes, the faster car will skid

a)

the same distance

b)

twice as far

c)

four times as far

d)

more than four times as far

49.

After a car is raised in a service station, we say the car has increased

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Chemical Energy

d)

Elastic Potential Energy

50.

Which law of thermodynamics best explains why ice melts and tea cools to the same temperature when the ice is placed in a cup of hot tea?

a)

0th Law

b)

1st Law

c)

2nd Law

d)

3rd Law

51.

Which of the following technologies best follows the first law of thermodynamics?

a)

Internal combustion engine

b)

Swimming pool

c)

Coffee cup

d)

Batteries

52.

An inventor claims to have made an internal combustion engine that manages to convert 1000 J of chemical energy into 1400 J of mechanical energy. This would violate the law of conservation of…

a)

Mass

b)

Momentum

c)

Energy

d)

Charge

53.

Which of the following heat energy transfers is the best example of transfer via conduction?

a)

Rising hot air meeting cool air to cause a thunderstorm

b)

Eggs frying on a hot pan

c)

Fire roasting a marshmallow

d)

The Sun warming a window

54.

Why does it take less time to cook brownies in a glass dish than in a metal dish?

a)

Radiation passes through the clear glass to the batter but is absorbed by the metal.

b)

The metal is better at conduction.

c)

The convection currents work better with a glass pan.

55.

An ice cube tray is removed from a freezer. What happens to the ice?

a)

The ice melts because thermal energy flows into it from the surroundings.

b)

The ice melts because it loses thermal energy into the surroundings.

c)

The ice melts because it no longer has energy from the freezer.

d)

The ice does not melt.

56.

All objects that have a temperature above zero K have thermal energy.

a)

True

b)

False

57.

Heat is ...

a)

a form of energy

b)

a transfer of energy

c)

a measure of internal energy

d)

fake news

58.

When coffee cools down …

a)

the molecules slow down and the kinetic energy increases

b)

the molecules speed up and the kinetic energy increases

c)

the molecules slow down and the kinetic energy decreases

d)

the molecules speed up and the kinetic energy decreases

59.

Objects that change temperature slowly have …

a)

high specific heat capacity

b)

low specific heat capacity

c)

high internal energy

d)

low internal energy

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