Question # 1

Torque is equal to.

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The product of magnitude of force and acceleration

The product of magnitude of force and momentum

The product of magnitude of force and displacement

The product of magnitude of force and angular velocity

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

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K.E.

P.E

Momentum

Acceleration

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.

The angle subtended at the centre of a circle by an arc equal to its radius is equal to.

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One rotation

One radian

One degree

One revolution

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

Which vector gives the displacement from one point to another in space.

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Position vector

Unit vector

Null vector

Distance vector

The dimensions of universal gravitational constant G are.

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[MLT-2]

[ML -2T-2]

[M-1L2T-2]

[ML-1T-1]

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

Which statement for geostationary orbit is false.

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A geostationary orbit must be directly above the equator

All satellites in a geostationary orbit must have the same mass

The period of a geostationary orbit must be 24 hours

There is only one possible radius for geostationary orbit

A shell explodes and many pieces fly off in different directions, which of the following is conserved.

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Momentum

K.E.

Momentum and K.E

Neither momentum nor K.E.

For which of the following objects is the centre of mass equidistant from every point on its surface

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An unsharpened pencil

A gramophone record

An egg

A table tennis ball

The product of force and duration of impact is called.

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Density

Momentum

Torque

Impulse

A body in equilibrium may not have

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Velocity

Momentum

Acceleration

K.E

A man in an elevator ascending with an acceleration will feel that his weight.

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Has increased

Has decreased

Remains the same

Vanishes

The curve between the acceleration and velocity of a body in SHM is a

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Circle

Ellipse

Square

Parabola

If a ball was thrown out of a rocket in free space, then it would.

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Accelerate away from the rocket

Remain motionless after leaving the rocket

Travel rectilinearly with constant speed

Move always parallel to the rocket

The resultant of two force 3 N and 4 N making an angle 90 ^o with each other is.

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1 N

3 N

5 N

10 N

One radian is equl to

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57.3 ^o

67.3 ^o

60 ^o

87.3 ^o

The pascal is not the SI derived unit of.

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Pressure

Stress

work

Tensile strength

The dimensions of moment of inertia are

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[ML2]

[MLT-1]

[ML2T-1]

[ML-1T-2]

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

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