Question # 1

The geostationary satellite is:

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Stationary

Rotating very fastly

Rotating with the period of earth

Rotating very slowly

A car of 1000kg traveling at 20m/sec rounds a curve of radius 100m. Find the necessary centripetal force

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4 x 10³ kg m/s²

3 x 10³ kg m/s²

5 x 10³kg m/s²

4.5 x 10³kg m/s²

In uniform circular motion, the factor that remains constant is:

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Linear velocity

Acceleration

Speed

All of these

A body of mass m tied to a string is moved in a vertical circle of radius r. the difference in tensions at the lowest point and the highest point is.

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2 mg

4 mg

6 𝑚g

8 mg

SI unit of kinetic energy of rotation is

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joule second

joule

joule second

joule meter

Two artificial satellites of unequal masses are revolving in a circular orbit around the earth with a constant speed. Their time periods:

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Will be different

Will depend on their masses

Will be same

Will depend upon the place of their projection

A satellite moving round the earth constitute

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An inertial frame of reference

Non inertial frame

Neither inertial nor non inertial

Both inertial and non-inertial

A body is moving in a circle with a constant speed. it has

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a constant velocity

a constant acceleration

a velocity of constant magnitude

an acceleration of constant magnitude

A stone attached to one end of a string is revolved around a stick so that the string winds on the stick and gets shortened) What is conserved)

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angular momentum

kinetic energy

linear momentum

none of the above

Torque is necessary for producing.

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angular speed

linear acceleration

angular acceleration

none of these

The kinetic energy of a body rotating with an angular speed 𝑚 depends on.

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angular speed

distribution of mass

neither (A) nor (B)

both (A) and (B)

For a body moving with constant speed in a horizontal circle, which of the following remains constant?

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Velocity

Centripetal force

Acceleration

Kinetic energy

When a particle moves in a uniform circular motion. It has:

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Radial velocity and radial acceleration

Tangential velocity and radial acceleration

Tangential velocity and tangential acceleration

Radial velocity and tangential acceleration

A particle is moving with constant speed by keeping itself at constant distance from a fixed point in a given plane. Its motion is

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Circular motion

Uniform circular motion

Uniform circular motion with fixed axis of rotation

Uniform circular motion with axis of rotation not defined

In case of planets the necessary acceleration is provided by

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Gravitational force

coulomb force

frictional force

centripetal force

A stone of mass 0.5kg tied with a string of length 1m is moving in a horizontal circle with a speed of 4ms-1 . The tension acting on the string in newton is:

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2

0.2

8

0.8

A point on the rim of wheel 400 cm in diameter has a velocity of 1600 cms-1 . The angular velocity of the wheel is:

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6 rad/s

4 rad/s

2 rad/s

8 rad/s

If the radius of the circular path of particle going around the circle is doubled without changing its frequency of rotation, then centripetal force on it is.

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doubled

halved

unchanged

quadrupled

Angular displacement in rotational motion is expressed in

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m

m²

Nms-1

Nm s

Which statement about geostationary orbit is false?

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A geostationary orbit must be directly above the equator

All satellite in a geostationary orbit must have the same masses

The period of geostationary orbit must be 24 hours

There is only one possible radius for a geostationary

The work done to keep the satellite in the given orbit is.

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Zero

infinity

unit

can’t be decided

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