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WorksheetsEnergy, Work and Power
Total questions: 19
Worksheet time: 27mins
When a roller coaster cart falls towards the ground, what happens to the amount of its potential energy?
Increases
Decreases
Stays the same
Nothing
What is always changing as work is done?
Kinetic Energy
Heat
Power
Gravitational Potential Energy
W = Fd cos θ
w = f D
W = F D
w = f d
Henry and Bob have the same mass. They race their 4-wheelers. Bob wins. Whose 4-wheeler has more power?
Bob's because it did the same work faster
Henry's because it did the same work slower
Bob's because it does more work in the same time.
Both have the same power because they carry the same mass through the same distance.
Which has more total energy, an ant on a fallen log or a spider on the ceiling. They are moving with the same speed and have the same mass.
The spider
The ant
They have the same total energy
The log
A semi truck and motorcycle are traveling on the same road with the same speed. Which has more energy?
The truck
The motorcycle
They have the same energy
It depends on the direction they are traveling
If the velocity of a car triples, what happens to its kinetic energy?
Increases by 9 times
increases by 3 times
Is decreased to 1/3
Increases by 3 Joules
Why do you speed up as you roll down a hill?
K is transferring to Ug
Ug is transferring to K
Us is transferring to Ug
Total Energy is increasing
If you use 30 J of energy to move an object, you have done ____ J of work.
3
10
30
0
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.
Work is done only if
a force is applied.
the force applied causes the object's motion.
an object is in motion.
What kind of energy(ies) does the car have at position A? The ground is h=0.
KE
KE + PE
PE
KE - PE
What is the mass of an object?
m=U/gh
m=Ugh
m= 2gh
240 kg
