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WorksheetsWork, Power, and Energy
Total questions: 40
Worksheet time: 20mins
Potential energy is transferred to kinetic energy as stationary objects begin to move.
True
False
Only if power is done
As height increases, which of the following energy forms also increases?
Gravitational
Kinetic
Elastic
Chemical
In the above picture, a bungee jumper is standing on a platform above the ground and jumps off. Consider the system to be the jumper, the cord, and the earth. Which energy bar chart is most representative of his final position (B)?
As mass in a system increases, what happens to the amount of total energy in the system?
Increases
Decreases
Stays the same
A boulder at the top of a cliff has 500 Joules of potential energy. If it rolls off the cliff, how much kinetic energy will it have halfway through its fall?
more than 500 J
less than 500 J
250 joules of kinetic and 250 of gravitational potential
zero Joules
At what point will the roller coaster have the least amount of GPE?
W
X
Y
Z
At what point will the roller coaster have the most amount of GPE?
W
X
Y
Z
At what point will the roller coaster have some GPE and some KE?
W
X
Z
What type of energy is increased from position x to position y
GPE
KE
Elastic
Chemical
Pick the option that is an example of an open system.
A fish tank with the lid on
A fish tank with the lid off
A car with the windows up
A pot of water with the lid on
A person pushes a stalled car to a service station. If the system includes the cart, the person, and the earth. Which Energy equation is likely correct?
W=Ek
Eelastic = Eelastic + Ek
Echem = Echem + Ek
W=Eg
A 10 kg boulder is resting at the edge of the cliff. If the mass of the boulder was doubled, what would happen to the gravitational potential energy?
It would be the same
It would be cut in 1/2
It would double
It would decrease
Running up stairs converts what type of energy into kinetic?
(hint what type of energy is stored in your body?)
Elastic
Electrical
Chemical
Electromagnetic
A basketball is lifted a certain distance up and therefore has potential energy. If it were lifted twice as high, how much potential energy would it have?
It would be cut in 1/2
It would be 3 times as much
It would be 2 times as much
It would be the same
Two sleds are racing down a hill. The orange sled has two passengers with more mass than the blue sled.If both sleds have the same amount of kinetic energy, which sled is moving faster?
The orange sled
The blue sled
They would be going the same speed
Which of the following energy forms increases when an object becomes warmer?
Thermal
Kinetic
Nuclear
Radiant
An object’s gravitational potential energy is directly related to all of the following EXCEPT
Height relative to the ground
mass
speed
acceleration due to gravity
A moving car has kinetic energy. Which factor most affects the amount of kinetic energy the car has?
if the car is at the top of a hill
the amount of electricity powering the headlights
the mass of the car
the velocity of the car
Which of the following statements is true according to the law of conservation of energy?
energy cannot be created or destroyed
energy can be converted from one form to another
both are correct
At what point does the person on the swing have 1/2 KE and 1/2 PE
A
B
C
Between A and B or between B and C
If the skateboarder's mass is INCREASED, what will happen to the total energy of the system?
The total energy will decrease.
The total energy will increase.
The total energy will stay the same.
The total energy will be zero.
Electrical energy can be obtained from which of the following?
wind energy
chemical energy
thermal energy
all of them can be converted to electrical energy
What type of energy is a spring is compressed by a rock
eleactic
chemical
thermal
electrical
What type of energy is a rabbit eating grass
eleactic
chemical
thermal
electrical
What type of energy is a stove heating up
eleactic
chemical
thermal
electrical
What type of energy is the sun emiting light rays
radiant
chemical
thermal
electrical
What type of energy is the TV as it is plugged in
radiant
chemical
thermal
electrical
What type of energy does the sun get it energy from
radiant
chemical
thermal
nuclear
Which of the following best describes the purpose of a system schema?
To show all energy transfers in a system
To show how energy is lost in a system
To show the percentage of each form of energy present in a system
To show objects within a system and how they interact
If you went to the stadium and walked up the stairs then ran up the stairs which would produce the most WORK
Run
Walk
The same
No work is done
To show objects within a system and how they interact
Graphs
Energy Bar Charts
Pie Charts
All of the options show this
A weight lifter lifts 70kg over his head from the ground, 2m in distance. He does this in 1.5 seconds. Use 9.8 m/s/s as the acceleration of gravity. How much power?
1372 w
914 w
93 w
210 w
If you went to the stadium and walked up the stairs then ran up the stairs which would produce the most Power
Run
Walk
The same
No work is done
85 Nm of work is done on a desk, which is pushed a distance of 5 m. How much force is exerted on the desk?
17 N
425 N
.06 N
0 N
What is work?
The product of force and the amount of displacement along the line of action of that force.
The product of mass and the amount of displacement along the line of action of that force.
The sum of force and the amount of displacement along the line of action of that force.
The product of force and the amount of momentum along the line of action of that force.
When is negative work done? Select all that apply!
doing a negative on a bench
pushing up on the bench
landing on a jump
catching a ball
A weight lifter moves a 55-kg dumbbell from the floor to a height of .86 meters. In 30 seconds she does 15 reps. How much work does the weight lifter do on the dumbbell? (Acceleration of gravity is 9.8 m/s/s)
0 J
710 J
6953 J
232 J
What is power?
a force moved through a distance
the rate of doing work
a mass moved a distance
the rate of doing matter
Bob pushes against a wall with a force of 500-N for 20 seconds. Obviously, he cannot move the wall, but he is a bit tired afterwards. How much work did bob do pushing against the wall?
100000J
10 J
500 J
0 J
A force of 60 N pushing on a crate produces 158 Nm of work. How many meters did the crate move?
8.0 m
2.6 m
9480 m
.4 m
