Question # 1

Earth's gravitational force of attraction vanishes at:

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6400 km

Infinity

42300 km

1000 km

1 hp is equal to :

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747 W

746 W

748 W

1000 W

At sea level height if mercury is:

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1000 cm

10 cm

1m

76 cm

A car starts from rest. It acquires a speed of 25 ms^-1after 20 s. The distance moved by the car during this time is

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31.25 m

250 m

5000 m

500 m

In SI units, the value of gravitational constant 'G' is

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6.673 x 10-9 Nm2 kg-2

6.673 x 10-10 Nm2 kg-2

6.673 x 10-11 Nm2 kg-2

6.673 x 10-12 Nm2 kg-2

Rate of change of momentum is equal to:

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Mass

Torque

Weight

Force

Base / Hypotenuse is called:

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Sin𝜽

Cos 𝜽

Tan 𝜽

Cot 𝜽

A body is in neutral equilibrium when its centre of gravity:

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Is at its highest position

Is at the lowest position

Keep its height if displaced

Is situated at its bottom

An instrument is used for measuring temperature is called:

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Barometer

Thermometer

Voltmeter

None of above

Two equal but unlike parallel forces having different line of action produce:

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A torque

A couple

Equilibrium

Neutral equilibrium

O maximum height the P.E of the body is:

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Zero

Maximum

Minimum

None of these

Tensile strain produces the change in the object.

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Length

Volume

Area

Density

Rocket works on principle of ______________

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Action Reaction

Law of inertia

Mass energy

Nil

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