Energy Quiz II Review

On a roller coaster, at what point does the rider have the most potential energy?

• At the lowest point of the hill

• At the halfway point of a hill

• At the top of the hill

• When the ride is over

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NGSS.MS-PS3-2

Which of the following is an example of kinetic energy during the zipline ride?

• Standing still on the platform

• Slowing to a stop

• Gliding down the line

• Clipping into the harness

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NGSS.MS-PS3-5

NGSS.MS-PS3-1

NGSS.MS-PS3-4

As the rider descends, what happens to the potential energy?

• It stays the same

• It increases

• It converts into kinetic energy

• It turns into gravity

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NGSS.MS-PS3-2

If the rider's mass is 70 kg and the platform is 25 meters high, calculate their potential energy. Use the 4 step method!

• Potential energy = mass × gravity × height = 70 kg × 9.8 m/s² × 25 m = 17,150 J

• Potential energy = mass × gravity × height = 70 kg × 9.8 m/s² × 25 m = 1,750 J

• Potential energy = mass × gravity × height = 70 kg × 9.8 m/s² × 25 m = 19,250 J

• Potential energy = mass × gravity × height = 70 kg × 9.8 m/s² × 25 m = 15,750 J

5. The rider doesn't reach the same height on the other side if there's no motor pulling them because:

• Energy is lost due to friction and air resistance.

• The rider is too heavy.

• The slope is not steep enough.

• Gravity is weaker on the other side.

Tags

NGSS.MS-PS3-5

During which time interval is the rider's kinetic energy increasing the most quickly?

• 0–2 seconds

• 5–7 seconds

• 2–4 seconds

• 8–10 seconds

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NGSS.MS-PS3-1

At approximately what time do the potential and kinetic energy lines intersect?

• Around 2 seconds

• Around 4 seconds

• Around 6 seconds

• Around 8 seconds

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NGSS.MS-PS3-1

What does the steady decrease in potential energy suggest about the rider's position on the zipline?

• The rider is climbing higher

• The rider is remaining still

• The rider is descending continuously

• The rider is speeding up and slowing down

Tags

NGSS.MS-PS3-2

What transformation of energy occurs as the bungee jumper falls and then slows at the bottom of the jump?

• Thermal → potential

• Potential → kinetic

• Kinetic → sound → thermal

• Chemical → electromagnetic

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

A zipline rider has a mass of 65 kg and starts from 30 meters high. Calculate the potential energy at the start of the ride. Use the 4 step method!

• Potential energy = mgh = 65 kg × 9.8 m/s² × 30 m = 19,110 J

• Potential energy = mgh = 65 kg × 9.8 m/s² × 30 m = 1,911 J

• Potential energy = mgh = 65 kg × 9.8 m/s² × 30 m = 19,911 J

• Potential energy = mgh = 65 kg × 9.8 m/s² × 30 m = 9,110 J