Question # 1

What would be the magnitude and direction of acceleration which would made the spring balance reading zero.

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Zero

1 m s-2 upward

9.8 m s-2 upward

9.8 m s-2 downward

The wave form of SHM is a

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Sine wave

Cosine wave

Square wave

Electromagnetic wave

It the force acting on a body is doubled its acceleration becomes.

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Half

Constant

Double

One fourth

A man in an elevator descending with an acceleration will conclude that his weight has

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Increased

Decreased

Constant value

Zero value

A body of mass 8 kg moves along a circle of radius 4 m with constant speed of 88 m s-1 The centripetal force on the body is.

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10 N

128 N

48 N

148 N

Acceleration due to gravity is not affected by which one of the following

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Latitude

Attitude

Longitude

Depth

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

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Electromagnetism

Conservation of momentum

Floatation

Hydraulic system

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

Solar cells are thin wafers made from

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Uranium

Nickel

Silicon

Cadmium

Oscillatory motion is always under

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An applied force

Restoring force and inertia

A periodic force

A gravitational force

The equation of parabola is.

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y= bx - ax2

x = by - ay2

y = ax + bx2

x = a -by2

Which of the following is conserved in SHM

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K.E.

P.E

Total energy

Electrical energy

A 10 kg rocket fragment falling towards the earth has a net downward acceleration of 5 ms -2 The net downward force acting on the fragment is

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5 N

10 N

50 N

105 N

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

A body of mass 2 kg attached to a spring is pulled to a distance of 4 cm What will be the value of spring constant K.

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490 N m-1

980 N m-1

1260 N m-1

1960- N m-1

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

When a body is lifted through a height 'h' the work done on the body appears in the form of.

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K.E

P.E

Heat

Density

Which quantity has different units from the other three.

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Density x volume x velocity

Rate of change of momentum

Young's modulus x area

Weight

By decreasing angle between two vectors their cross product.

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Increases

Decreases

Remains the same

Vanishes

Which pair of the following forces has a resultant force of 2 N.

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1 N and 1 N

1 N and 3 N

1 N and 2 N

2 N and 2 N

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

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