Question # 1

A particle performs SHM of amplitude 0.020 and frequency 2.5 Hz. What is its maximum speed.

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0.050 m s-1

0.125 m s-1

0.314 m s-1

0.75 m s-1

In an elastic collision

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K.E. is conserved

Both K.E. and momentum are conserved

K.E. is not conserved

Only momentum is conserved

The angular frequency time period and frequency of a simple pendulum depends only on the.

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Mass and amplitude

Mass and gravitational acceleration

Amplitude and frequency

Length and gravitational acceleration.

Supplementary units radian and steradian were established for

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Density

Viscosity

electric intensity

Geometrical quantities

By decreasing angle between two vectors their cross product.

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Increases

Decreases

Remains the same

Vanishes

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

Angular moment is conserved due to

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Variable force

Constant force

Central force

Uniform force

The SI unit of gravitational constant G is.

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kg m-1 s-1

kg m2 s-2

kg m3 s-2

kg m2 s-1

While passing through the atmosphere total energy is reduced due to.

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scattering

Absorption

Reflection

All of these

When a body is taken out of the earth's gravitational field, the P.E. with respect to earth is

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Zero

Minimum

Maximum

geothermal

Angular momentum of a body under a central force is

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Zero

Maximum

Minimum

Constant

Out of the following pairs, which one does not have te same dimensions.

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Force and weight

Pressure and stress

Energy and work

Momentum and torque

The horizontal distance of a projectile from the point of launch to the point of impacts is called.

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Height of projectile

Range of projectile

Path of projectile

Angle of projectile

The action and reaction forces

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Must act upon the same body

Must act upon different bodies

Must be equal in magnitude but need not have the same line of action.

Different speed at the different height during ascent and during descent.

In microwave ovens, heating is produced by the phenomena of

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Reflection

Refraction

Damped oscillations

Resonance

If a force of 10 N makes an angle of 30 ^o with x-axis its component is given by

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1.866 N

8.66 N

0.89 N

0.866 N

The unit formed by combining the fundamental untis of length , mass and time.

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Absolute units

Practical units

Bse unit

Derived units

Unit vector of a vector A describes

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Magnitude of a given vector

Direction of given vector

Shape of a given vector

Magnitude and direction of a given vector

Ethanol is a replacement of

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Gasoline oil

Kerosene oil

Refinery oil

vegetable oil

The centre of gravity of a body is

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The centre of the body

The point at the mass of the body acts

The point at which the whole weight of the body acts

The point of rotation

In an accelerated or non - inertial frame of reference the weight of the body depends upon.

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Acceleration of the frame of reference

Velocity of the body

Momentum of the body

Velocity of the frame of reference

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