Question # 1

The force of friction that comes into action after the motion has started

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Static friction

Dynamic friction

Friction only

Limiting friction

The pascal is not the SI derived unit of.

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Pressure

Stress

work

Tensile strength

The dimensions of universal gravitational constant G are.

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[MLT-2]

[ML -2T-2]

[M-1L2T-2]

[ML-1T-1]

A body is said to be in complete equilibiurm when

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It attains translational equilibrium

Vector sum of all the forces is zero

Vector sum of all the torques is zero

Vector sum of all the torque and forces is zero

The wave form of SHM is a

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Sine wave

Cosine wave

Square wave

Electromagnetic wave

The working of the rocket is based on the principle of.

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Electromagnetism

Conservation of momentum

Floatation

Hydraulic system

When net force acting on a system is zero which of the following will be constant.

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Force

Linear momentum

Angular momentum

Linear impulse

If a force of 10 N makes an angle of 30 ^o with x-axis its component is given by

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1.866 N

8.66 N

0.89 N

0.866 N

The source of geothermal energy is

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The fusion in the sun

the radioactive decay in the earths interior

the rotation of earth around the sun

The rotation of earth around its own axis

A force of 10 N is acting along z-axis, its component along x -axis and y-axis is

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2 N , 8 N

3 N, 7 N

5 N each

Zero

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

A physical quantity not directly involved in rotating motion is.

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Moment of inertia

Mass

Angular velocity

Torque

MT-2 is the dimensionless formula of.

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Moment of iniertia

Viscosity

surface tension

Angular acceleration

Ethanol is a replacement of

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Gasoline oil

Kerosene oil

Refinery oil

vegetable oil

In a projectile motion, the horizontal range depends upon.

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Initial velocity

Velocity at the highest position

angel of projection

Vertical component of velocity

The path of projectile is maximum at

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Point of lauch

Highest point

Point of landing

Both a and c

A stone is whirled in a vertical circle at the and of a string when the stone is at the highest position, tension in the string is

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Maximum

Zero

Equal to weight of the stone

Less than weight of the stone.

Vectors are ofhen spilt into two or more orthogonal components what is true of these components.

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they are perpendicular

They are parallel

They are antiparallel

They have same magnitude

When a projectile reaches the highest point the vertical component of velocity becoems.

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Small

Vi cos thetha

Zero

Maximum

Solar cells are thin wafers made from

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Uranium

Nickel

Silicon

Cadmium

The total energy of a body executing SHM is directly proportional to

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The amplitude

The square of the amplitude

Square root of the amplitude

Reciprocal of the amplitude

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