Question # 1

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

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K.E.

P.E

Momentum

Acceleration

If two different masses have same momentum then the lighter one has more.

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K.E. and velocity

Velocity only

Both K.E. and P.E.

Only P.E

Oscillatory motion is always under

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An applied force

Restoring force and inertia

A periodic force

A gravitational force

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

A simple pendulum suspended from the celling of a lift has a time period T when the lift falls freely the time period of the pendulum will become

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Zero

T/9.8

9.8 T

Infinity

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

When a force of 16 N acts on a mass of 4 kg for a time of 4 s. What is the rate of change of momentum.

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1 kg m s-2

4 kg m s-2

8 kg m s-2

16 kg m s-2

The SI unit of momentum is.

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kg m s-2

kg m2 s-2

kg m s-1

kg s-1

In projectile motion, the body has

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One component of velocity

Two components of velocity

Three components of velocity

No component of velocity

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

On the ground the gravitational force on a satellite is W What is the gravitational force on the satellite when at height R/50

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0.96 W

0.98 W

1.04 W

1.02 W

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

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K.E.

P.E

Momentum

Acceleration

Absolute P.E. of a body can be calculated

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At centre of the earth

Below centre of the earth

From surface of the earth

Below surface of the earth

The graph between restoring force and time in SHM is a

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Straight line

Parabola

Sine wave

Circle

One light year is equal to.

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9.46 x 10¹⁵ cm

9.46 x 10¹⁵ m

9.46 x 10¹⁵ km

7.88 x 10¹⁴ m

If the presence of air friction, the path of a projectile appears as.

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Straight line

Parabola

Hyperbola

zig zag

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 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

Supplementary units radian and steradian were established for

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Density

Viscosity

electric intensity

Geometrical quantities

A force of 50 N acts on a body for 10 s the change in momentum will be.

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5 N s

200 Ns

500 Ns

800 N s

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.

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