9th_PH_5_3_I2_Pulleys, Conservation of Mechanical Energy, Power and Th

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Pulleys, Conservation of Mechanical Energy, Power and Thermal Energy

PART II

The output force is greater

The output force is less

1/10

How does the input force compare to the output force for a fixed pulley?

1/10

They are the same

WELL DONE

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1/10

Each side supports 1/2 of the weight

Each side supports 2x the weight

It depends on the weight of the object

2/10

2/10

In a moveable pulley, how is the object's weight distributed through the rope?

WELL DONE

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2/10

The input distance is increased

The input work is increased

3/10

The input work is decreased

3/10

How is it possible to have less input force but more output force?

WELL DONE

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3/10

Work

4/10

Magnifies the force

Lifts an object

4/10

What does a moveable pulley do that a fixed pulley does not?

WELL DONE

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4/10

5/10

Energy can be created but not destroyed

Energy cannot change forms

Energy can be neither created nor destroyed

5/10

What does the law of conservation of energy state?

WELL DONE

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5/10

The creation of thermal energy in an object or system.

The transfer of thermal energy from one object or system to another.

6/10

What is heat?

6/10

The destruction of thermal energy in an object or system.

WELL DONE

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6/10

Energy from a natural resource that can be replenished.

7/10

7/10

Any form of energy that can be recycled.

Energy from the movement of an object.

Which of the following is the best definition of renewable energy?

WELL DONE

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7/10

The Earth's core.

8/10

The Earth's deserts.

The Earth's crust.

8/10

Most of the Earth's geothermal energy is contained within:

8/10

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8/10

The surface of the Earth would heat up

9/11

The surface of the Earth would cool

The surface of the Earth would break apart

9/11

What would happen if geothermal energy ceased to exist?

9/11

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9/11

The ability to do work

The movement of particles within a system

The temperature of a substance

10/11

Energy can best be defined as:

10/11

10/11

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10/11

Chemical bonds

The number of particles in a system.

The movement of particles

11/11

What makes thermal energy possible?

11/11

PLAY AGAIN

EXCELLENT JOB!

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