WorksheetsEnergy, Work and Power #3
Total questions: 22
Worksheet time: 17mins
In diagram 2, if the 600 kg cart is initially at rest, what is its velocity at point B?
19.8 m/s
15.0 m/s
10.3 m/s
3.8 m/s
In diagram 2, if the mass of the car is 600 kg, what is the change in potential energy from point A to point B?
411,600 J
294,000
176,400 J
117,600 J
What is the kinetic energy of an 9 kg bowling ball rolling at 3.30 m/s?
29.7 J
323.4 J
49.005 J
14.85 J
An object has 12.4 J of potential energy and 23.5 J of kinetic energy. What is the mechanical energy of the system?
11.1 J
1.895 J
35.9 J
291.4 J
You’re watching a volleyball game and someone asks you what type of energy best describe the movement of the volleyball players. Which of the following choices should your answer be in order to be correct?
Chemical
Sound
Mechanical
Potential
What would happen to the kinetic energy of an object if you doubled the mass?
The kinetic energy would be cut in half
The kinetic energy would double
The kinetic energy would triple
It would stay the same because mass does not effect kinetic energy
A 35 kg chair is lifted 5 m off the ground. What is its potential energy?
175 J
30 J
1715 J
40 J
Pick which equation you would use to solve:
100 J of work were done over 5 seconds to do three push ups.
PE=mgh
W=Fx
P=tW
Pick which equation you would use to solve:
A rock of 5kg, is dropped from a height of 5 meters and accelerates to the ground at a rate of 9.81m/s^2.
PE=mgh
KE=21mv2
W=Fx
P=tW
Pick which equation you would use to solve:
A box is pushed a distance of 3m with a force of 10N.
PE=mgh
KE=21mv2
W=Fx
P=tW
How much power is required to raise a 30 kg crate a vertical distance of 6 m in a time of 4 seconds?
120 W
52.5 W
450 W
385 W
525 W
Which formula is this?
? = mgh +21mv2
Potential Energy
Kinetic Energy
Mechanical Energy
Work
At which point does the ball has the greatest gravitational potential energy (GPE)?
A
G
D
C
G
When an object is carried at a constant
velocity by a force,
no work is done on the
object.
the work done is maximum on the
object.
the work is done minimum on the
object.
the work done is 100 % on the
object.
Bobby lifts a book to the second floor in 20 seconds. Carol lifts the same book to the second floor in 10 seconds. Who did more work?
Bobby
Carol
They did the same amount of work
Not enough information
A picture of a plane of mass 80 000 kg is flying in the air at velocity of 900 kmh-1. The height of the planes is 35 000 feet from the ground level.
Calculate it gravitational energy and kinetic energy at that time.
PE = 2.74 x 1010 J, KE = 2.50 x 109 J
PE = 2.74 x 1010 J, KE = 3.24 x 1010 J
PE = 8.37 x 109 J, KE = 3.24 x 1010 J
PE = 8.37 x 109 J, KE = 2.50 x 109 J
