Energy Lesson 2 Quiz Review

Which of these has kinetic energy?

• a child kicking a soccer ball

• a book sitting on a shelf

• cars parked in a parking lot

• hat and gloves on a table

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These vehicles are all moving at the same speed along a road. Which of these statements is correct?

• All the vehicles has the same kinetic energy because they are all moving at the same speed.

• The delivery truck has the greatest kinetic energy because it has the most tires in contact with the pavement.

• The motorcycle has the most kinetic energy because it is the vehicle with the least mass.

• The delivery truck has the greatest kinetic energy because its mass is greater than that of the other vehicles.

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Which of these has the most kinetic energy?

• a 50 kg boulder suspended from a cliff

• a 7,500 kg car parked on a steep hill

• a 50 g fish swimming in a fish tank

• a 25 kg fish tank sitting on a table

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At which point does the ball have the greatest amount of gravitational potential energy?

• point W

• point X

• point Y

• point Z

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A sea bird builds its nest on a ledge above the ocean, where it fishes for food. When does the bird have the most potential energy?

• flying at 10 m/s 10 m above the ocean

• diving for fish 3 m below the ocean surface

• sitting in its nest 20 m above the ocean

• swimming on the ocean surface at 2 m/s

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Which change would increase the kinetic energy of a moving object the most?

• doubling the speed of the object

• reducing the mass by half

• reducing the speed by half

• doubling the mass of the object

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A 40 kg girl is pushing a 40 kg boy in a 20 kg toy wagon.

The wagon is moving at a constant speed of 2.0 m/s. Calculate the combined kinetic energy of the boy and the wagon.

• 160 J

• 200 J

• 100 J

• 120J

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Look at the water cycle picture. Put the numbered locations in order from where the water has the greatest potential energy to where it has the least. (1-clouds, 2-ocean, 3-resevoir, 4-river)

• 2,4,3,1

• 1,2,3,4

• 1,3,4,2

• 1,4,3,2

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A truck drives to a rock quarry at a speed of 20 m/s. The truck takes on a load of rocks, which doubles its mass, and leaves at the same speed of 20 m/s. How does the the kinetic energy of the truck as it left the quarry compare with its kinetic energy on the way to the quarry?

• The truck's kinetic energy quadruples after it picks up the rocks.

• The truck's kinetic energy is cut in half after it picks up the rocks.

• The truck's kinetic energy is doubled after it picks up the rocks.

• The truck's kinetic energy doesn't change.

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A truck drives to a rock quarry at a speed of 20 m/s. The truck takes on a load of rocks, which doubles its mass, and leaves at the same speed of 20 m/s. When the truck gets to a hill, it slows its speed to 10 m/s. How does the energy of the loaded truck before the hill compare to the truck after it begins its climb up the hill?

• The kinetic energy of the truck on the hill is 1/2 of that of the energy of the truck before the hill.

• The kinetic energy of the truck on the hill is double of that of the energy of the truck before the hill.

• The kinetic energy of the truck on the hill is quadruple of that of the energy of the truck before the hill.

• The kinetic energy of the truck on the hill is 1/4 of that of the energy of the truck before the hill.

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