Question # 1

The process where by energy is dissipated from the oscillating system is called.

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Resonance

Damping

Forced oscillation

Free oscillation

The equal and opposite forces acting on a body form

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Angular momentum

Linear momentum

Torque

Couple

If the K.E. of a body becomes four times of its initial value the new momentum will be.

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Half

Same

Four time

Double

Resonance phenomenon in a vibrating body

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May increase the amplitude

May decrease the amplitude

May not affected the amplitude

All of the above

The moment of linear momentum is called.

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Torque

Couple

Impulse

Angular momentum

Two simple pendulums of the same length but having different masses

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Have different frequencies

Will have period proportional to their masses

Will have periods independent of their length

Have the same period

The SI unit of plane angle is

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Radian

Degree

Steradian

Radian per second

In an Isolated system , total energy of the vibrating's mass and spring is

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Low

High

Constant

Variable

The horizontal range is equal for the angles.

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30 ^o and 45 ^o

30 ^oand 60 ^o

45 ^o and 90 ^o

60 ^oand 75 ^o

A bomb dropped from an aeroplane explodes in air, its total.

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Momentum decreases

Momentum increases

K.E. Increases

K.E. Decreases

The process of getting energy by direct combusting method from the waste products is commonly known as.

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Solid waste

Depletion region

Green house

Fregmentation

Which of the following is renewable source of energy.

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Oil

Natural gas

Uranium

Sunlight

if the line of action of force passes through the axis of rotation of origin, then torque is.

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Maximum

Negative

Zero

1

What must be changing when a body is accelerating uniformly.

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Force acting on the body

Mass of the body

Speed of the body

Velocity of the body

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

The hydrogen filled balloon possesses

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P.E

K.E

Heat energy

Elastic energy

Which quantity has dimensions different from the others.

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Energy per unit volume

Force per unit area

Angular momentum per unit mass

Pressure

Simple harmonic motion is a type of

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rectilinear motion

Circular motion

Rotational motion

Zig Zag motion

It the slope of velocity time graph is increasing with time the body is said to have.

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Positive acceleration

Average acceleeration

Uniform acceleration

Retardation

A mass accelerates uniformly when the resulting force acting on it.

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is zero

Is constant but not zero

Increases uniformly w.r.t time

Is proportional to the displacement of the mass from a fixed point

A girl weighing 400 N takes 4 s to run up the stairs How much P.E. does she gain if height of the stairs is 3 m.

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120 J

400 J

200 J

1200 J

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