Question # 1

The resultant of two forces 3 N and 4 N acting at right angle to each other is

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7 N

5 N

4 N

1 N

Maximum number of components of a vector may be

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Infinite

One

two

three

The product of rotational inertial 'I' and angular velocity ' w' is equal to.

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Torque

Linear momentum

Angular momentum

Force

The angle of projection for which its maximum height and horizontal range are equal

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46 ^o

56^o

66^o

76^o

A force of 100 N makes an angle of 60o with Y- Axis, its horizontal component is.

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50 N

60 N

70.7 N

86.6 N

Energy dissipated usually appears as

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P.E.

Heat Energy

Chemical energy

Nuclear Energy

In case the work done in zero.

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Constant pressure

Constant volume

Constant temperature

Constant mass

Sodium chloride in a flame gives

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Green light

White light

Red light

Yellow light

Angular acceleration is produced by

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Power

Torque

Pressure

Force

The regular or steady flow of fluid is called

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Stream line

Turbulent flow

Average flow

None of these

When the rocket moves away from the earth, the work against gravity

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Remains constant

Varies directly with distance

Varies inversely with distance

Varies inversely with square of distance

This is used for

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Co-efficient of friction

Co-efficient of expansion

Co-efficient of viscosity

Co-efficient of contraction

The K.E. of bullet of mass 500 gm moving at a speed of 200 ms-1

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250 J

125 J

2500 J

10,000 J

The product of time period and frequency is.

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Zero

1

2

3

the example of mechanical waves is

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Water waves

Infrared waves

Radio waves

Ultraviolet waves

The molecules of an ideal gas exert

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Force on each other

No force on each other

Large force on each other

Pressure on each other

A body of mass 2 kg moving with velocity of 4 ms-1 has K.E. equal to.

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16 J

8 J

32 J

2 J

A fog droplets are in freely falling condition,. the ratio of their radii is 2:3, the ratio of their terminal velocities will be.

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2:3

4:6

4:9

9:4

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