Week 8 TEST - PE, KE, Energy Transformations

Roller coasters are popular attractions at amusement parks. A cart on a roller coaster approaches the highest point on the coaster. As the cart reaches the top, it slows down.

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Which statement best describes the energy of the roller coaster as it slows down while traveling to the top of the coaster?

• The cart gains both kinetic and potential energy.

• The cart gains kinetic energy and loses potential energy.

• The cart loses kinetic energy and gains potential energy.

• The cart loses both kinetic and potential energy.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-2

In the classroom demonstration shown below, a rubber ball is dropped from Position 1. The ball bounces as shown.

At which of these positions does the ball have both the greatest potential energy and the least kinetic energy?

• Position 1

• Position 2

• Position 3

• Position 4

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NGSS.MS-PS3-5

NGSS.MS-PS2-4

A bicycle rider is traveling up a hill. When the rider reaches the top of the hill, she stops to rest. Then she travels down the hill. The diagram shows the rider in the three different positions.

• When the rider is at the top of the hill, her potential energy is the greatest, and her kinetic energy is the least.

• As the rider moves up the hill, her kinetic energy increases, and her potential energy decreases.

• When the rider goes down the hill, her potential energy increases, and her kinetic energy decreases.

• As the rider reaches the bottom of the hill, her kinetic energy and her potential energy decrease.

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NGSS.MS-PS3-5

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-4

A marble is given potential energy by being placed at Location W. When the marble is released, it rolls down the track.

At which location does the marble have maximum kinetic energy? Select the correct location on the image.

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NGSS.MS-PS3-5

NGSS.MS-PS3-1

NGSS.MS-PS3-2

Which type of energy best describes the motion of a ball rolling down a hill?

• Potential

• Kinetic

• Latent

• Mechanical

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NGSS.MS-PS3-5

NGSS.MS-PS3-1

Energy changes occur when water in a pot is heated on a stove burner.

Which of the following statements describe the energy transformations?

• Chemical energy in the natural gas is transformed into thermal energy which heats the water.  

• Electrical energy in the natural gas is transformed into thermal energy which heats the water.

• Light energy in the natural gas is transformed into chemical energy which warms the water.

• Thermal energy in the natural gas is transformed into chemical energy which warms the water.

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NGSS.MS-PS3-5

NGSS.MS-PS3-4

NGSS.MS-PS1-4

The diagram shows how a cylinder in a car engine causes the car to move.

Which description of the energy conversions in this process is correct?

• The chemical energy in the fuel-air mixture is converted to thermal energy, which is then converted to mechanical energy.

• The mechanical energy in the fuel-air mixture is converted to electrical energy, which is then converted to thermal energy.

• The electrical energy in the fuel-air mixture is converted to mechanical energy, which is then converted to thermal energy.

• The thermal energy in the fuel-air mixture is converted to electrical energy, which is then converted to mechanical energy.

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NGSS.MS-PS3-5

The blades of a wind turbine are at rest until the movement of air causes the blades to spin.

Which energy transformation happens when the blades are spinning as shown?

• Electrical to mechanical

• Chemical to electrical

• Mechanical to electrical

• Chemical to mechanical

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NGSS.MS-PS3-5

NGSS.MS-PS3-1

The main parts of a working clothes dryer are shown in the diagram.

This appliance dries clothes primarily by converting —

• electrical energy to heat and mechanical energy

• mechanical energy to heat and electrical energy

• electrical energy to heat and light

• mechanical energy to heat and vaporization

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NGSS.MS-PS3-3

When a lion eats a zebra and then uses the energy from the zebra to run, the lion’s body converts —

• chemical energy to mechanical energy

• electrical energy to chemical energy

• chemical energy to light energy

• mechanical energy to chemical energy

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NGSS.MS-LS1-7