WorksheetsEnergy Review
Total questions: 19
Worksheet time: 5hrs 45mins
The Law of Conservation of Energy states that...
(SELECT ALL THAT APPLY)
Energy cannot be created
Energy cannot be destroyed
Energy can be transformed from one type to another (ex: from potential to kinetic)
Energy can be destroyed
The mass of the cart is 25 kg, what is the total mechanical energy of the system at point C?
7350 J
6125 J
1225 J
4410 J
If the mass of the cart is 25 kg, what is the velocity of the cart at Point B?
24.2 m/s
23.6 m/s
12.5 m/s
31.6 m/s
Annie is sitting at the top of a roller coaster. At the top of the roller coaster, she has a total potential energy of 400 J. What would Annie's new potential energy be if we quadrupled her mass and tripled her height?
4800 J
1600 J
1200 J
3650
A cat is moving on a cart with a total kinetic energy KE. What would the kinetic energy be if the velocity of the cart is doubled?
2KE
1/(2KE)
4KE
1/(4KE)
At what point on the pendulum is the mass going the fastest?
A
B
C
D
Pictured above is a roller coaster. The mass of the cart is 15 kg. What is the total mechanical energy at point A?
0 J
11025 J
4580 J
6210 J
What is the total mechanical energy at point B, where the height of the cart is 75 m, if the mass of the cart is 15 kg?
11025 J
0 J
4350 J
7350
What is the total mechanical energy at point C, where the cart has a height of 36 m, if the mass of the cart is 15 kg?
11025 J
5292 J
5733 J
0 J
What is the amount of gravitational potential energy the cart has at point C, if its mass is 15 kg?
5292 J
5733 J
11025 J
0 J
The mass of the cart in the roller coaster pictured above is 15 kg. How much, if any, work was done to raise the cart from point A to point B?
0 J
11025 J
5733 J
5292 J
Which of the following energy bar graphs correctly shows the energy from Point B to Point C?
The mass of the cart in the roller coaster pictured above is 15 kg. What is the kinetic energy of the cart at Point D?
11025 J
0 J
3381 J
7644 J
The mass of the cart in the rollercoaster pictured above is 15 kg. What is the kinetic energy at point E?
0 J
11025 J
7644 J
3381 J
Tom the cat is chasing Jerry the mouse. Tom has a mass of 15 kg and Jerry has a mass of 4 kg. If Tom is chasing Jerry at a velocity of 8 m/s, what is the magnitude of work done to bring Tom to a stop?
386.7 J
579.5 J
978.3 J
457.5 J
A skydiver is plummeting toward the Earth. He has a total mechanical energy of 460,000J. If the skydiver has a potential energy of 320,000J, how much kinetic energy does he have?
780,000 J
140,000 J
320,000 J
460,000 J
Jeremy is on top of a cliff that is 15 m tall. He has two masses, one of mass m and one of mass 2m. Which of the following statements is true?
The mass m has more potential energy.
The mass 2m has more potential energy.
They have the same amount of potential energy.
Neither have potential energy, since they are not moving.
Fernando, who has a mass of 35 kg, is standing on a ladder. When he is at rest at the top of the ladder, he has 686 J of energy. If Fernando steps off of the ladder and falls, how much kinetic energy does he have the instant before he hits the ground?
17,150 J
686 J
19.6 J
Cannot determine without knowing his velocity the instant before he hits the ground.
Billy Bob is mowing the lawn. He applies a force of 15 N to the right. If the lawnmower moves 5 m to the right, did Billy Bob do any work?
No, because Billy Bob did not apply enough force to move the lawnmower.
No, Billy Bob did not do any work because he did not change the potential energy of the lawnmower.
Yes, because the force applied and the displacement are in the same direction.
Yes, because the displacement is in the positive direction.
