Question # 1

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 centre of gravity of a rectangular or parallel gram shaped plate is.

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At the centre

At the intersection of diagonals

At the intersection of medians

At the axis of rotation

Angular frequency time period and frequency in SHM do not depend upon.

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Mass

Force constant

Amplitude

All of these

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.

when a bowl of water is take into the bottom of a well the work done is.

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Positive

Negative

Zero

Maximum

If slope of velocity time graph gradually decreases, then a body is said to have

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Negative acceleration

Positive acceleration

Uniform velocity

Variable velocity

The product of force and duration of impact is called.

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Density

Momentum

Torque

Impulse

If a body of mass 'm' was released in a vacuum just above the surface of a planet of mass M and radius R what will be the gravitational acceleration.

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GmM/R

GM/R²

GM/R

GM/2R

The maximum height reached by a projectile with a velocity of 14 m s-1 at an angle of 30 ^owith the horizontal is.

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1.5 m

2.5 m

1 m

2 m

The fundamental quantities which form the base of the SI are.

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mass, energy and time

mass, force and time

mass, length and time

mass , length and time

The amplitude of a vibrating body placed in a resistive medium.

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Increases exponentially with time

Decreases exponentially with time

Remains constant with time

Cannot be observed

The value of 'g' is affected by earth's

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Non spherical shape

Daily motion

Volume

Density

A body in equilibrium may not have

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Velocity

Momentum

Acceleration

K.E

The magnitude of the resultant of two forces may be increased by

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Increasing the angle between them

Decreasing the angle between them

Drawing the parallelogram to represent them

Drawing the force perpendicularly

A body of mass 1 kg hanging with a spring of spring constant 60 N m-1 is rotation in a horizontal circle The values of angular frequency will be.

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80 .94 Hz

89. 4 Hz

98. 4 Hz

108 . 6 Hz

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

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

Which of the following is a set of supplementary units.

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Radian and steradian

Radian and mole

Steradian and candela

Radian and kelvin

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

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

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K.E.

P.E

Momentum

Acceleration

Time period of a simple pendulum depends upon.

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Thickness of the thread

Mass of the pendulum

Length of the pendulum

Amplitude of vibration

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