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WorksheetsWork and Power Test Review
Total questions: 96
Worksheet time: 2hrs 5mins
Name
Class
Date
1.
The unit used to measure work is the
a)
Watt
b)
Newton
c)
Joule
d)
meter
2.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
3.
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
4.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
5.
Force is a _____ or _______
a)
simple complex
b)
push pull
c)
up down
d)
in out
6.
In which of these cases is work being done?
a)
A student sleeps
b)
A student pushes a locked door that does not move
c)
a student carries his chair into another room
d)
A student sits on the carpet
7.
What is the unit for mass?
a)
Kilogram (Kg)
b)
Newton (N)
c)
Joule (J)
d)
Watt (W)
8.
How far does a car that weighs 5,000 N go if 18,000 J of work is done on it?
a)
3.8 m
b)
3.7 m
c)
3.2 m
d)
3.6 m
9.
How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?
a)
15 J
b)
45 J
c)
0 J
d)
5 J
10.
The amount of work done in a certain amount of time is known as
a)
work
b)
effort force
c)
resistance force
d)
power
11.
How much power is the tractor that drags a plow with a force of 500 N a distance of 10 meters in 20 seconds?
a)
250 Watts
b)
250 Joules
c)
100,000 Watts
d)
100,000 Joules
12.
The more POWER you use to move an object, the more work you do.
a)
True
b)
False
13.
Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
14.
If 68 W of power is produced in 18 seconds, how much work is done?
a)
1,224 J
b)
0.264 J
c)
3.77 J
d)
12.24 J
15.
If a group of workers can apply a force of 1,000 Newtons to move a crate 20 meters, what amount of work will they have accomplished?
a)
20,000 J
b)
200 J
c)
2,000 J
d)
20 J
16.
How much time is needed to produce 720 Joules of work if 90 watts of power is used?
a)
0.125 s
b)
8 s
c)
64800 s
d)
80 s
17.
If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?
a)
272 m
b)
17 m
c)
4.05 m
d)
272 cm
18.
What is the equation for power?
a)
P = Work/time
b)
P = Force/time
c)
P = time/distance
d)
P = Work * time
19.
What is the equation for work?
a)
W = mass * acceleration
b)
W = force * distance
c)
W = force/distance
d)
W = speed/time
20.
P=25 watts
W=5000 Joules
t=???
W=5000 Joules
t=???
a)
200 sec
b)
0.0005 s
c)
125000 s
d)
125 s
21.
The unit used to measure power is the
a)
Watt
b)
Newton
c)
Joule
d)
Newton*meter
22.
True or false: when the distance an object moves is zero the work done on the object is also zero.
a)
True
b)
False
23.
Power is defined as the quantity that measures the rate at which _____ is done or energy is transformed.
a)
energy
b)
time
c)
work
d)
elasticity
24.
What does one newton exerted over a distance of one meter equal?
a)
One watt
b)
One hertz
c)
One volt
d)
One joule
25.
The SI unit or force is
a)
Newton (N)
b)
Watt (W)
c)
Joules (J)
26.
Bro A bench presses 145-lbs five times in 20 seconds.
Bro B bench presses 145-lbs five times in 10 seconds.
Bro B bench presses 145-lbs five times in 10 seconds.
a)
Bro A did more work.
b)
Bro B did more work.
c)
Both Bros did the same amount of work.
d)
Bro
27.
Bro A bench presses 145-lbs five times in 20 seconds.
Bro B bench presses 145-lbs five times in 10 seconds.
Bro B bench presses 145-lbs five times in 10 seconds.
a)
Bro A has more power
b)
Bro B has more power
c)
Both Bros have the same power
d)
Bro
28.
How do you find mechanical energy?
a)
weight x hieght
b)
potential + kinetic
c)
energy + weight
d)
none of these
29.
Energy due to motion is ____________ energy.
a)
Potential
b)
Energy
c)
Kinetic
d)
Friction
30.
__________ is stored energy.
a)
Potential
b)
Kinetic
c)
None of the above
d)
All of the above
31.
Gravitational potential energy depends on the ________ and ________ of the object.
a)
Height and mass
b)
Friction and movement
c)
Mass and Movement
d)
Height and Friction
32.
which point has the most potential energy
a)
G
b)
f
c)
b
d)
a
33.
Which graph BEST shows the relationship of kinetic energy to potential energy as you lift a box on a shelf.
a)
A
b)
B
c)
C
d)
D
34.
Which graph BEST shows the relationship of kinetic energy to potential energy as roll down a roller coaster
a)
A
b)
B
c)
C
d)
D
35.
Which of the following is a scientific observation?
a)
The potato is brown in color.
b)
The potato tastes the best.
c)
The potato may cause allergies.
d)
The potato smells funny.
36.
Mr. McNeice wanted to know if different types of music affected people's heart rates, so he played different music and checked their pulses. What is the dependent variable?
a)
type of music
b)
heart rate
c)
how long they listend to music
d)
Mr. McNeice
37.
Which question can best be investigated by a scientist?
a)
Should I buy a red shirt or a green shirt?
b)
Does chocolate milk or plain milk taste better?
c)
Does a plant need sunlight to grow?
d)
Which feels softer, cat fur or dog fur?
38.
The container is filled to the 350 mL mark with water.
a)
observation
b)
inference
c)
problem
d)
hypothesis
39.
Why should an experiment be repeated?
a)
to form a hypothesis
b)
to reduce the chance of error
c)
to change controls
d)
to identify the problem
40.
This is the outcome of the experiment. We get data and results from this.
a)
Independent Variable
b)
Dependent Variable
c)
Control
d)
Constant
41.
How many independent variables should be tested at a time in a scientific investigation?
a)
none
b)
one
c)
two
d)
three
42.
Which is the dependent variable in Amelia's experiment?
a)
the number of bean plants in each group
b)
the amount of water given daily to each plant
c)
the height of each bean plant
d)
the amount of fertilizer given to each group of bean plants
43.
The variable that is changed on purpose is:
a)
Control
b)
Dependent
c)
Independent
d)
Outcome
44.
The variable in the experiment that is the outcome that you measure is called:
a)
Control
b)
Dependent
c)
Independent
d)
Hypothesis
45.
When experimenting with the growth of a plant, a scientist uses three plants, two different fertilizers, equal light, and equal water. What type of variable is the water?
a)
Dependent
b)
Independent
c)
Control
d)
Outcome
46.
When experimenting with the growth of a plant, a scientist uses three plants, two different fertilizers, equal light, and equal water. What type of variable is the water?
a)
Dependent
b)
Independent
c)
Control
d)
Outcome
47.
Newton’s third law of motion states that for every action there is an equal and opposite reaction. How does this law differ from a theory?
a)
A theory explains a set of well tested observations; a law describes a pattern in nature.
b)
Laws can be changed with the addition of new evidence but theories cannot.
c)
A law explains a pattern in nature in more detail than a theory.
d)
Theories are based on more evidence than laws.
48.
a visual representation of data used to show patterns and relationships
a)
data table
b)
graph
c)
experiment
d)
controlled variable
49.
This double line graph for rainfall in two cities shows what pattern?
a)
Rain is steady all year.
b)
It is rainier in the summer months than in winter.
c)
It is the rainiest in winter.
d)
There is no rain. Both cities are dry year round.
50.
How many total people took the survey?
a)
50
b)
150
c)
100
d)
200
51.
The graph below shows the number of sunny days and rainy days in a city during four months.
Based on the graph,how many more sunny days than rainy days did this city have during the months of April, May, and June?
Based on the graph,how many more sunny days than rainy days did this city have during the months of April, May, and June?
a)
21
b)
56
c)
26
d)
20
52.
Which group had the largest sample size?
a)
1
b)
2
c)
3
d)
4
53.
You should always _________ the question to make sure you understand what the question is asking.
a)
smell
b)
hide
c)
reread
d)
laugh
54.
Come up with an answer to the ________ before looking at the list of choices.
a)
question
b)
pony
c)
phone
d)
meal
55.
Read ALL of the answers and __________ the choices that don't make sense.
a)
sneeze
b)
list
c)
cake
d)
cross out
56.
Look carefully at ___________________ answers. Find the more precise answer.
a)
big
b)
similar-sounding
c)
round
d)
complicated
57.
Which of the following shows an energy transformation from chemical energy to electrical to light energy?
a)
A bolt of lightning lights the night sky.
b)
A candle glows brightly in the dark.
c)
A fire in a fireplace lights up a room.
d)
A battery causes a flashlight to shine.
58.
What energy transformations take place when a battery-operated radio is in use?
a)
Electrical to chemical to light
b)
Sound to chemical to mechanical
c)
Chemical to electrical to sound
d)
Light to electrical to thermal
59.
People get energy from the food that they eat and transform that energy as they move. Which energy transformations occur as a student rapidly rubs the palms of his hands together?
a)
mechanical to thermal to electrical
b)
chemical to mechanical to thermal
c)
mechanical to chemical to sound
d)
chemical to sound to electrical
60.
Which of the following devices transforms electrical energy into mechanical energy?
a)
An e-reader
b)
a fan
c)
a manual pencil sharpener
d)
ipod
61.
The diagram shows a complete circuit with a battery and a buzzer making noise. This circuit works by transforming -
a)
chemical energy to electrical to sound.
b)
electrical energy to thermal to light.
c)
sound energy to electrical to chemical.
d)
mechanical energy to electrical to sound.
62.
A television works by transforming electrical energy into what other kinds of energy?
a)
Light, thermal, and sound
b)
Thermal, chemical, and solar
c)
Sound, mechanical, and electrical
d)
Light, chemical, and mechanical
63.
The picture shows a microwave oven. As a microwave oven is operated, electrical energy is transformed into all of the following types of energy EXCEPT —
a)
solar
b)
light
c)
thermal
d)
mechanical
64.
A cell phone battery dies. It gets plugged into an electrical outlet to recharge. Which of the following energy transformations occur during the charging?
a)
mechanical to chemical
b)
electrical to solar
c)
chemical to light
d)
electrical to chemical
65.
The Law of Conservation of Energy states energy cannot be gained or lost but only transformed.
a)
True
b)
False
66.
Which example best represents potential energy
a)
Fire
b)
ice cream
c)
bouncing ball
d)
ocean waves
67.
Which example best represents kinetic energy
a)
streched rubber band
b)
glass of milk
c)
A computer
d)
A flying kite
68.
The purpose of the panels is to change solar energy into ____________.
a)
light energy
b)
electrical energy
c)
chemical energy
d)
mechanical energy
69.
A rock at the edge of a cliff.
a)
Potential
b)
Kinetic
70.
Which items would have this energy transformation: chemical energy -> mechanical energy?
a)
person running
b)
candle burning
c)
windmill turning
d)
playing a violin
71.
Which items would have this energy transformation: chemical energy -> electrical, light and thermal energy?
a)
turning on a flashlight
b)
nuclear power plant
c)
digesting an apple
d)
tanning bed
72.
A hairdryer converts --
a)
electrical energy into chemical
b)
electrical energy into thermal
c)
chemical energy into mechanical
d)
thermal energy into mechanical
73.
Which energy conversion is taking place when you put gasoline in a car?
a)
thermal -> electrical
b)
mechanical -> electrical
c)
chemical -> mechanical
d)
mechanical -> electromagnetic
74.
what type of energy is stored in a battery?
a)
electrical
b)
chemical
c)
thermal
d)
mechanical
75.
what type of energy is stored in a battery?
a)
electrical
b)
chemical
c)
thermal
d)
mechanical
76.
When you eat pizza, Chemical Energy is transferred to _____ Energy.
a)
Solar
b)
Electrical
c)
Mechanical
d)
Chemical
77.
What is the kinetic energy of a ball with a mass of 5kg rolling at 10m/s
a)
50 J
b)
5 J
c)
250 J
d)
25 J
78.
What is the kinetic energy of a 4kg shotput thrown with a velocity of 13m/s
a)
676 J
b)
3.25 J
c)
17J
d)
338 J
79.
What is the kinetic energy of a 1500 gram object moving at a velocity of 100 m/s
a)
112.5 J
b)
7,500,000 J
c)
75 J
d)
7,500 J
80.
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
81.
Friction acts in a direction ___________ to the object's direction of motion.
a)
similar
b)
opposite
c)
parallel
d)
west
82.
When a falling Barbie hits the ground, the ground hits the Barbie and the Barbie accelerates more than the ground since the Barbie has less mass than the ground. This is an example of
a)
Newton's first law, the law of inertia
b)
Newton's second law, the law of acceleration
c)
Newton's third law, the law of action reaction
d)
The law of universal gravitation
83.
At which position does the block have the greatest potential energy?
a)
A
b)
B
c)
C
d)
D
84.
Assuming the inclined surface is frictionless, what should the Kinetic energy at the bottom of the ramp be?
a)
10 J
b)
20 J
c)
100 J
d)
200 J
85.
Assuming there is friction on the incline, and the block only has a kinetic energy of 8 J at the bottom of the incline, about how much of the potential energy became heat?
a)
2 J
b)
12 J
c)
92 J
d)
192 J
86.
If the block of ice in this diagram has a weight of 100 N, how much work will it take to get it to the top of the ramp? Neglect friction.
a)
300 J
b)
3000 J
c)
33 J
d)
99 J
87.
Choose any of the following choices below that represent examples of the work energy principle.
a)
lifting a box of weight 10 N to a height of 2 m stores 20 J of PE
b)
pushing a crate on a frictionless surface using 20 N of force over a distance of 10 m increases the box's KE by 200 J
c)
Compressing a spring using a force of 15 N through a distance of 1m stores 15 J of PE in the spring
d)
All of these are examples of the work energy principle
88.
A dishwasher does 25 J of work to wash your dishes. It uses 85 J of energy in the process. How much energy was converted to heat?
a)
110 J
b)
60 J
c)
3.4 J
d)
0.29 J
89.
An air conditioner uses 3000 J to cool a room. 300 J are wasted to heat, vibration, and sound. What is the efficiency of the air conditioner?
a)
90%
b)
70 %
c)
50%
d)
10%
90.
A pile of logs burns for a campfire. How did energy change form?
a)
thermal & radiant to chemical
b)
electrical to mechanical
c)
mechanical to thermal & radiant
d)
chemical to thermal & radiant
91.
The efficiency of a machine can be increased by reducing __________________________.
a)
effort
b)
resistance friction
c)
fulcrum
d)
friction
92.
Friction causes energy to be transformed from KE to what?
a)
PGE
b)
chemical
c)
thermal
d)
elastic
93.
Anything that can fall has stored energy called ______.
a)
chemical potential energy.
b)
gravitational potential energy.
c)
elastic potential energy.
d)
kinetic energy.
94.
Why would one ball travel a greater distance than the other when pushed with the same amount of force?
a)
Different sizes
b)
Different weights
c)
Different masses
d)
Different forces
95.
One object has twice as much mass as another object. The first object also has also twice as much...
a)
velocity
b)
gravitational acceleration
c)
inertia
d)
all of these
96.
An object with a mass of 2.0 kg accelerates 2.0 m/s2 when an unknown force is applied to it. What is the amount of force?
a)
4 newtons
b)
4 kg
c)
1 newton
d)
1 kg
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