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21 questions
What two factors affect an object's kinetic energy?
area and volume
mass and weight
weight and height
mass and speed
Where would this tossed baseball have the least amount of kinetic energy?
point W
point X
point y
point z
Where would this tossed baseball have the greatest amount of kinetic energy?
point W
point X
point y
point z
What is the correct unit for energy?
meters (m)
kilogram meters per second (kg m/s)
Newtons (N)
Joules (J)
What is the equation for calculating gravitational potential energy
mv
1/2 mv^2
mgh
Ft
What is the equation for calculating kinetic energy?
mv
1/2 mv^2
mgh
Ft
Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level. (g = 10 Nkg-1)
250,000 J
2,500,000 J
25,000,000 J
250 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? (KE = 1/2mv2)
8.5 J
45 J
7.5 J
22.5 J
Alice kicks a soccer ball with a mass of 2.1 kg. The ball leaves the ground moving 30 meters per second. What is the kinetic energy of the soccer ball? (KE = 1/2mv2)
567 J
900 J
945 J
30 J
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
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