Question # 1

When velocity of the body is doubled, which one is doubled too.

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K.E.

P.E

Momentum

Acceleration

In projectile motion, the body has

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One component of velocity

Two components of velocity

Three components of velocity

No component of velocity

The international acceptable scientific notation of a number 123.4 is

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12.34 x 10¹

1.234 x 10²

1.234 x 10³

0.123 x 10³

Which are the two basic properties of a vector.

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Curvature and direction

Magnitude and direction

Magnitude and sign

Curvature and sign

Length of second pendulum is

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98 cm

99 cm

99.2 cm

100 cm

The product of two non zero numbers is.

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A vector quantity

A unit vector

Always zero

Never equal to zero

A body is thrown vertically upward with initial velocity 9.8 ms-1 it will reach the height.

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4.9 m

19.9 m

29.4 m

49.2 m

For the angular momentum of a system to remains constant, the external torque should be

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small

Large

Neither small nor large

zero

If the average velocity of an object zero in some time interval, the displacement of the object for that interval will be.

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Infinite

Zero

Increasing

Decreasing

Which pair of the following forces has a resultant force of 2 N.

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1 N and 1 N

1 N and 3 N

1 N and 2 N

2 N and 2 N

A body of mass 1 kg hanging with a spring of spring constant 60 N m-1 is rotation in a horizontal circle The values of angular frequency will be.

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80 .94 Hz

89. 4 Hz

98. 4 Hz

108 . 6 Hz

tuning a radio set is an example of.

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Musical resonance

Electrical resonance

Mechanical resonance

Damping

If a body a moving with constant acceleration the velocity time graph will be a

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zig zag

Straight line

Constant value

zero value

An object travels at constant speed around a circle of radius 1.0 m in 1.0 s the magnitude of its acceleration is.

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zero

1.0 m s-2

2 m s-2

4 pi2 m s-2

The SI unit of coefficient of viscosity of

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kg m s-1

kg m-1 s-1

kg ms -2

In an accelerated or non - inertial frame of reference the weight of the body depends upon.

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Acceleration of the frame of reference

Velocity of the body

Momentum of the body

Velocity of the frame of reference

For maximum range angle of projection of the projectile should be

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45 ^o

90^o

120 ^o

180 ^o

A bus and a car moving with the same K.E. are acted upon by the same retarding force then the

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car will stop first

Bus will stop first

Both will stop simultaneously

Both will never stop

The magnitude of resultant of three force is 3. If its x-component is 2, Y component is 1. Its 2-component will be.

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1

2

3

4

Original source of biomass is.

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Stars

Moon

earth

Sun

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