Quarter 2 Review

What is the formula for potential energy?

• PE = Fd
• PE = 1/2 mv^2
• PE = mvt
• PE = mgh

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NGSS.MS-PS3-2

A 5 kg object is placed on a shelf 10 meters above the ground. What is the gravitational potential energy of the object relative to the ground? (Use g = 9.8 m/s²)

• 30 J

• 50 J

• 100 J

• 490 J

A 12 kg rock is sitting on a cliff 25 meters high. Calculate the gravitational potential energy of the rock relative to the base of the cliff. (Use g = 9.8 m/s²)

• 2940 J

• 480 J

• 1200 J

• 2400 J

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NGSS.MS-PS3-2

A person rides a bicycle up a hill. The energy from the food they ate earlier is transformed into ______ energy as they pedal.

• thermal potential

• both potential and kinetic

• kinetic

• potential

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Which location has the greatest gravitational potential energy?

• A, the height is the shortest at this location

• C, the height is in the middle at this location

• D, the height is almost at the top at this location

• E, the height is the greatest at this location

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NGSS.MS-PS3-2

A car comes to a stop after driving up a hill. What happened to the car's kinetic and potential energy?

• It has transferred to the surroundings, increasing the total energy available in the universe.

• It has been converted to other forms; the total amount of energy in the universe remains unchanged.

• It has been permanently destroyed, reducing the total energy of the universe.

• The car's motion temporarily increased the amount of energy in the universe, but the level returned to its former value as the car came to rest.

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NGSS.MS-PS3-4

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As a person slides down a slide, their speed increases. This is an example of potential energy transforming into what?

• kinetic energy

• electrical potential energy

• elastic potential energy

• chemical potential energy

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What is the force that always moves opposite to the motion of an object?

• normal force

• gravity

• air resistance

• friction

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NGSS.MS-PS2-1

According to the Law of Conservation of Energy...

• The total energy decreases because of friction

• The total energy in a closed system does not change

• The total energy increases when the speed increases

• The total energy always changes

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NGSS.MS-PS3-5

Where does the biker have the greatest total energy?

• The total energy is the same at locations A, B, and C

• The energy is the greatest at location B

• The energy is the greatest at location C

• The energy is the greatest at location A

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NGSS.MS-PS3-1

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