Energy Systems Clarified

Energy Systems Clarified

Assessment

Interactive Video

Physics, Science

11th Grade - University

Hard

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The video tutorial explores the relationship between work and energy within a system. It begins with a simple example of a block attached to a spring sliding up an incline. The instructor discusses the importance of defining the system and how different forces, such as gravity and friction, affect the work done on the system. The work-energy theorem is introduced, and the concept of internal and potential energies is explained. By adding elements like Earth, spring, and incline to the system, the tutorial demonstrates how energy conservation principles apply, emphasizing the significance of identifying system components.

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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What determines how work and energy are related in a system?

The size of the objects

The color of the objects

The objects defined as the system

The speed of the objects

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which force does not do work on the block when it is displaced?

Spring force

Kinetic friction

Normal force

Force of gravity

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the basic equation relating work and energy?

Potential energy equals kinetic energy

Force equals mass times acceleration

Energy equals mass times velocity

Change in energy equals the net energy transferred

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When the Earth is added to the system, how is the force of gravity classified?

Internal force

Frictional force

External force

Non-conservative force

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the work done by the spring force when the spring is part of the system?

It is included as elastic potential energy

It becomes an external force

It is converted to kinetic energy

It is ignored

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of non-conservative forces like friction in the system?

They do not affect energy

They convert energy into internal energy

They increase potential energy

They decrease kinetic energy

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the conservation of energy imply when the system includes everything?

Energy is created

Energy is destroyed

Energy is lost

Energy changes forms but is conserved

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