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9th_PH_5_3_I2_Pulleys, Conservation of Mechanical Energy, Power and Th

Via Talentum Academy Inc.

Created on May 7, 2023

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PART II

Pulleys, Conservation of Mechanical Energy, Power and Thermal Energy

start

They are the same

1/10

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

1/10

The output force is less

The output force is greater

1/10

next

WELL DONE

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

2/10

2/10

It depends on the weight of the object

Each side supports 2x the weight

Each side supports 1/2 of the weight

2/10

NEXT

WELL DONE

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

3/10

The input work is decreased

3/10

The input work is increased

The input distance is increased

3/10

NEXT

WELL DONE

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

4/10

Lifts an object

Magnifies the force

4/10

Work

4/10

NEXT

WELL DONE

What does the law of conservation of energy state?

5/10

Energy can be neither created nor destroyed

Energy cannot change forms

Energy can be created but not destroyed

5/10

5/10

NEXT

WELL DONE

The destruction of thermal energy in an object or system.

6/10

What is heat?

6/10

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

The creation of thermal energy in an object or system.

6/10

NEXT

WELL DONE

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

Energy from the movement of an object.

Any form of energy that can be recycled.

7/10

7/10

Energy from a natural resource that can be replenished.

7/10

NEXT

WELL DONE

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

8/10

The Earth's crust.

The Earth's deserts.

8/10

The Earth's core.

8/10

NEXT

8/10

What would happen if geothermal energy ceased to exist?

9/11

The surface of the Earth would break apart

The surface of the Earth would cool

9/11

The surface of the Earth would heat up

9/11

NEXT

9/11

10/11

Energy can best be defined as:

10/11

The temperature of a substance

The movement of particles within a system

The ability to do work

10/11

NEXT

10/11

11/11

What makes thermal energy possible?

11/11

The movement of particles

The number of particles in a system.

Chemical bonds

EXCELLENT JOB!

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