Question # 1

By decreasing angle between two vectors their cross product.

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Increases

Decreases

Remains the same

Vanishes

The scalar product of two vectors in negative when

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Vectors are parallel

Vectors are antiparallel

Vectors and perpendicular

Vectors are parallel with same magnitude

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

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

In simple harmonic motion we have the conservation of.

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K.E.

P.E

Total energy

Electrical energy

An object at the end of a spring oscillates with SHM of angular frequency 2 rad s-1 What is the period of oscillation.

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0.32 s

0.50 s

0.80 s

3.1 s

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

The path of projectile is maximum at

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Point of lauch

Highest point

Point of landing

Both a and c

The Circular motion of a particle with constant speed is.

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Periodic and SHM

Periodic but not SHM

linear and SHM

Neither periodic nor SHM

In simple harmonic motion it is found that the total energy of a system.

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Is independent of the amplitude

Depends on the amplitude squared

Is independent of the mass

All of these

A body is termed as perfectly elastic if.

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It can move freely

Its surface is perfectly somooth

It is not affected by an external force

It recovers the original shape when the deforming force is remover

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

If a planet of mass double than that of the earth and radius three times greater than the earth a 10 kg mass on its surface will weight.

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2.2 N

4.4 N

6.7 N

13.2 N

A body of mass 2 kg is suspended from the celling of an elevator moving up with an acceleration 'g' its apparent weight in the elevator will be.

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9.88 N

19.8 N

29.4 N

39. 2 N

If the resultant of all the forces acting on a body is zero then the body is in

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Translation equilibrium

Rotational equilibrium

Equilibrium

Dynamic equilibrium

The wave form of SHM is a

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Sine wave

Cosine wave

Square wave

Electromagnetic wave

If 'p' is the momentum of an object of mass 'm' the expression p2/m has base units identical to.

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Power

Force

Velocity

Energy

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

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Electromagnetism

Conservation of momentum

Floatation

Hydraulic system

If the resultant of two forces, each of magnitude F have the magnitude F, angle between the forces will be.

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30^o

80^o

90 ^o

120 ^o

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

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

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