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WorksheetsUnit 8: Energy, Work & Power Review
Total questions: 24
Worksheet time: 12mins
Is work being done: a cup falls to the floor.
Yes
No
Is work being done? A boulder is pushed with a force of 1300 N for 20 meters.
Yes
No
Is work being done? A boy holds a book in his hands.
Yes
No
Is work being done? A girl applies a force to a wall of bricks.
Yes
No
As kinetic energy increases, velocity also increases.
True
False
As speed increases, potential energy increases.
True
False
According to the law of conservation of energy, the total amount of energy in the word
remains constant
changes constantly
increases
decreases
The SI unit for work is
watt
joule
calorie
kilogram
The SI unit for power is
joule
calorie
kilogram
watt
The SI unit for weight is
watt
joule
kilogram
newton
When solving power equations, time MUST be in seconds. If you are given minutes for time, you must convert to seconds before solving.
True
False
A diver standing on top of a diving board above a pool has
kinetic energy
potential energy
nuclear energy
sound energy
An un-lit match has
kinetic energy
chemical potential energy
no energy
elastic potential energy
A hair dryer, toaster oven and an iron all have what energy change in common?
The convert electrical energy to mechanical energy
They convert mechanical energy to electrical energy
They convert electrical energy to heat energy
They convert electrical energy to light energy
A bus transfers chemical energy into ___________ energy so that the bus can move.
thermal
mechanical
gravitational potential
kinetic
A ball has 75 J of potential energy when sitting on a shelf. What is the amount of kinetic energy the ball has the instant it hits the floor?
75 J
0 J
750 J
25 J
If the net force on an object is zero, then the object has:
action forces
balanced forces
unbalanced forces
reaction forces
What happens to energy when work is done?
energy is transferred
energy is destroyed
energy is gained
energy is lost
Stored energy is also known as ____________ energy.
kinetic
mechanical
radiant
potential
Which of the following is NOT used to calculate potential energy?
mass
gravitational force
height
velocity
In a nuclear fission reaction, mass is transformed into
matter
light
nuclei
energy
The primary source of the sun's energy is
chemical energy
nuclear fusion
nuclear fission
potential energy
The units used to show how much energy we get from food is called the _______________.
joule
calorie
kilogram
watt
Your muscles change chemical energy into ____________ energy.
electrical
mechanical
nuclear
chemical
