7 Work, Energy & Power

7 Work, Energy & Power

8th Grade

27 Qs

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7 Work, Energy & Power

7 Work, Energy & Power

Assessment

Quiz

Engineering

8th Grade

Practice Problem

Medium

Created by

Husna Razami

Used 3+ times

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27 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes work in physics?

Energy transferred by force over a distance

Energy stored in an object at rest

Force acting without displacement

The ability to store energy

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Calculate the kinetic energy of a 2 kg object moving at 3 m/s.

3 J

6 J

9 J

12 J

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the SI unit of work?

Newton

Joule

Watt

Horsepower

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which form of energy is associated with the motion of an object?

Potential Energy

Thermal Energy

Kinetic Energy

Elastic Energy

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Clarify the term 'elastic potential energy'.

Energy due to height

Energy due to motion

Energy stored in stretched or compressed materials

Energy from chemical reactions

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement best explains the first law of thermodynamics?

Energy cannot be created or destroyed, only transformed

Heat can only flow from hot to cold

Energy stored in springs is potential

Efficiency is always 100%

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Distinguish between conduction and convection.

Conduction is heat transfer through liquids only, convection is through solids

Conduction is direct contact heat transfer, convection is heat transfer through fluids

Conduction is always faster

Conduction requires motion, convection does not

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