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WorksheetsWork, Power, Energy
Total questions: 57
Worksheet time: 44mins
Which does not illustrate kinetic energy?
It is expressed in Joule.
It depends upon the objects’ mass and speed.
It is the energy an object possesses due to its motion.
It depends upon the objects’ mass and objects’ height.
What is the potential energy of a 3kg ball that is on the ground?
0 J
3 J
9.8 J
29.4 J
A roller coaster whose average speed is 32 m/s is at the top of a 72m hill and weighs 966N. At the top of the hill the coaster car has ___________________ energy.
only kinetic energy
only potential energy
mostly kinetic energy
both kinetic and potential energy
A 100 N force is applied to move an object a horizontal distance of 5 meters at constant speed in 10 seconds. How much power is done?
50J
50W
500J
500W
Which statement illustrates work done?
A weightlifter holds a barbell above her head.
A teacher applies a force to a wall and becomes exhausted.
A rolling marble hits a note card and moves it across a table.
A waiter carries a tray full of meals across a dining room at a constant speed.
A weightlifter holds a 100 kg barbell above her head. Is work done?
Yes because there is a force applied to the barbell and the force causes a displacement of the barbell.
Yes because there is an upward force applied to the barbell and the barbell moves vertically.
No because no displacement occurred.
No because there is no force applied.
What is the energy possessed by the cart?
potential energy
kinetic energy
mostly potential
mostly kinetic
What is the total mechanical energy of the object?
100J
75J
50J
25J
Energy is
how fast you do something.
the ability to do work.
confusing.
how fast you lift something.
Jane carries a 5 kg box and Lorie carries a 10 kg box up a set of stairs, who did more work?
Jane because his box was lighter.
Lorie because her box weighed more.
Can't tell.
If you lift a box that is twice as heavy as your friend you are doing
the same amount of work.
two times more work than your friend.
half as much work as your friend.
Cannot be determined.
You push a crate with a force of 100 N for 5 meters. How much work did you do?
500 J
100 J
50 J
5 J
A 5 kg cat falls off a 3 m tall fridge. What is the cat's PE as it starts to fall?
15 J
30 J
150 J
1470 J
________________ is the rate at which work is done.
Power
Work
Time
Energy
Energy can be transformed from one form into another, but the total amount of energy never changes.
Work-energy theorem
Law of conservation of energy
Newton's second law of motion
King's theorem of energy
Stretched bow and arrow?
What is this simple machine?
Inclined Plane
Lever
Gear
Wheel and axle
What is the simple machine that used by the boy to take water?
Lever
Incline plane
Pulley
Gear
How efficient is a machine that can do 300J of work, but requires 400J of energy put in?
25%
50%
75%
100%
Type of energy created by friction
potential
kinetic
thermal
total energy
