Question # 1

In falling object potential energy is covered to:

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K.E

Force

P.E

Nil

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

One horse power is equal to:

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746 W

749 W

764 W

794 W

The energy stored in coal is

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Heat energy

Kinetic energy

Chemical energy

Nuclear energy

Fossils fuels are usually compound of:

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Carbon

Hydrogen

Carbon & Hydrogen

None of these

Work is done when force displace inits own _____________

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Way

Method

Direction

None

1 hp is equal to :

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747 W

746 W

748 W

1000 W

Which of following units is equal to Kgm² s^-2

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Newton

Joule

Watt

Coloumb

The ability of a body to do work is known as

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power

energy

kinetic energy

potential energy

Which quantity is scalar?

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Force

Power

Velocity

Torque

Which pair of physical quantities has same SI unit?

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energy , power

power , work

energy , work

work , momentum

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

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

If mass of body is 10 kg travelling with speed of light, how much energy is generated?

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E = 9 × 1017 J

E = 9 × 1015 J

E = 9 × 1018 J

E = 9 × 1016 J

The S.I unit of work is :

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J

N

Kg

m

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