Question # 1

Mass-Energy equation was given by:

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Newton

Einstein

Joule

Pascal

If 1N is force and body is displaced to 1m than work is :

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2 J

1 J

3 J

4 J

If a person is not moving when he lifts a load on his head work is:

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FS

FS Cos𝜽

FS Sin𝜽

0

Formula of work is:

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F X S

F X V

F/S

S/F

The ability of a body to do work is known as

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power

energy

kinetic energy

potential energy

The work done in lifting a brick of mass 2 kg through a height of 5 m above ground will be:

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2.5 J

10 J

50 J

100 J

Kinetic and potential energy are the kinds of energy:

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Chemical

Nuclear

Light

Mechanical

A body OF mass 10 kg taken to height of 5m:

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P.E = 500 J

P.E = 50 J

P.E = 5 J

P.E = 5000 J

If the direction of motion of the force is perpendicular to the direction of motion of the body, then work done will be

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Maximum

Minimum

Zero

None of these

According to law of conservation of energy increases in P.E is equal to:

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Increase K.E

Decrease in K.E

Decrease in P.E

None

Formula of Power:

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P = wt

P = w/t

P = t/w

P = w/t²

In Einstein's mass-energy equation ,c is the

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Speed of sound

Speed of light

Speed of electron

Speed of Earth

Rate of doing work is called:

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Energy

Torque

Power

Moment

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9th Class Physics Chapter 6 Work and Energy English Medium KPK Boards Online Mcqs MCQs With Answers

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