Question # 1

A couple consists of how many forces:

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1

2

3

4

If the velocity of the body becomes double then its kinetic energy will:

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Remain the same

Become double

Become four times

Become half

The S.I unit of efficiency is :

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J/s

Nm

watt

It has no unit

Work done is maximum when angle between force and displacement is:

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45°

0°

60°

90°

The symbol of sigma is :

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Σ

m

=

$

The bad conductor of Heat is:

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Iron

Copper

Air

Aluminium

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

The product of force and distance is :

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Force

Work

Torque

Nil

A thimble of circular scale consists of equal division.

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100

10

1000

None of these

The mathematical form of law of gravitation is:

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F = GMe m/Re2

F = Gm1m2/r2

F = GMem1/Re2r2

None

Base / Hypotenuse is called:

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Sin𝜽

Cos 𝜽

Tan 𝜽

Cot 𝜽

Einstein's mass-energy equation is

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E = mc

E = mc2

E = 2mc

E = m2c

The unit of work is :

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J

N

Ns

m

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