WorksheetsEnergy Check-in
Total questions: 18
Worksheet time: 27mins
Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.
250,000 J
2,450,000 J
2,451,663 J
248 J
Lilly's cat ran through your yard. The cat has a mass of 5 kg. He is running at a speed of 3 m/s. What is the kinetic energy of the cat as he runs?
8.5 J
45 J
7.5 J
22.5 J
What is the mass of a ball that has a kinetic energy of 115 J and is traveling at 9 m/s?
1035 kg
23.5 kg
12.8 kg
2.84 kg
A exercise ball is on a table 2.5 m above the ground. What is the mass of the ball if it has a GPE of 56.8 J?
71 kg
22.72 kg
142 kg
2.32 kg
112.5 J
7,500,000 J
75 J
7,500 J
225 KJ
0.225 KJ
75 KJ
0.075 KJ
78.125 J
31250 J
781.25 J
78,125 J
An oven uses 400 J of electricity to produce 300 J of heat. How efficient is it?
133 %
75 %
300 %
.75 %
A blender uses 1000 J of energy to spin it's blades and make smoothies. What is the input energy?
Electrical
Sound
Heat
Mechanical
A TV uses 200 J of electricity and transforms it into 125 J of sound and light and 75 J of heat. How efficient is it?
62.5%
.625%
37.5%
.375%
In an experiment, a machine uses 800J of energy to perform 320J of useful work. What is the machine's efficiency?
25%
40%
50%
60%
