Question # 1

In rotational motion the quantity which plays the same role as the inertial mass in rectilinear motion.

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Angular momentum

Linear momentum

Moment of inertia

Torque

The dimensions of moment of inertia are

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[ML2]

[MLT-1]

[ML2T-1]

[ML-1T-2]

Express the quantity 225 x 10^-6 s using prefixes.

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0.225 micro second

2.25 micro second

225 micro second

2,25 neno second

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

If the rate of change of momentum w.r.t Time is zero then

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Momentum is a function of time

Momentums is not conserves

Momentum is constant

The impulse is into he same direction as the momentum

the consumption of energy by a 60 watt bulb in 2 s is

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0.02 J

30 J

120 J

60 J

MT-2 is the dimensionless formula of.

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Moment of iniertia

Viscosity

surface tension

Angular acceleration

Which of the following is the magnitude of the gravitational force and is not the inherent property of the body.

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Mass

Weight

Speed

Length

What would be the magnitude and direction of acceleration which would made the spring balance reading zero.

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Zero

1 m s-2 upward

9.8 m s-2 upward

9.8 m s-2 downward

Which of the following statements concerning G and g is true.

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g is scalar white g is a vector

g is inversely proportional to the mass of the planet

g is independent of the mass of the planet

both G and g have the same units

Two forces act together on an object the magnitude of their resultant force is minimum when they act at

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0 ^o

45^oC

90^o

180 ^o

The unit of energy are the same as that of

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Force

Power

Work

Efficiency

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

The corss product of two vectors is zero when they

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Are parallel to each other

Are perpendicular to each other

Are at an angle of 120 ^o

Both are equal

The 1st condition of equilibriums satisfied if.

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Linear acceleration is zero

Angular acceleration is zero

The vector sum of all the forces is zero

The vector sum of all the torque is increase

Frequency of second pendulum is.

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0.5 Hz

1.0 Hz

1.5 Hz

2.0 Hz

A man in an elevator descending with an acceleration will conclude that his weight has

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Increased

Decreased

Constant value

Zero value

In the case of forced oscillations frequency of oscillation is.

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The natural damped frequency

The natural undamped frequency

The frequency of the external periodic force

Some other frequency

Angular acceleration is produced due to

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Centripetal force

Torque

Force

Mass

The SI unit of angular velocity is.

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cm s-1

rad s-2

cm s-2

rad s-1

The acceleration due to gravity

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Has the same value everywhere in space

Has the same value every where on the earth

varix with altitude on the earth

Is great her on the moon owing to its smaller diameter

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