Question # 1

Two satellites are going around the earth at a height of 250 km and 450 km respectively. If angular speed for both is same, then centripetal acceleration will be.

Choose an answer

more for first

more for second

same for both

nothing can be decided

A body revolved around the sun 27 times faster then the earth what is the ratioof their radii

Choose an answer

1/27

1/4

1/9

1/3

The force which provides the necessary centripetal force to keep the mud in circular path is called

Choose an answer

cohesive force

adhesive force

frictional force

gravitational force

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.

Choose an answer

2 mg

4 mg

6 𝑚g

8 mg

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

Choose an answer

Zero

infinity

unit

can’t be decided

A body crosses the topmost point of a vertical circle with critical speed. Itscentripetal acceleration, when the string is horizontal will be

Choose an answer

4g

3g

g

6g

A particle revolves round a circular path with a constant speed. The accelerationof the particle is

Choose an answer

A. A long the circumference of the circle

Along the tangent

Along the radius

Zero

The force which can do no work on the body on which it acts:

Choose an answer

Frictional force

Elastic force

Gravitational force

Centripetal force

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

Choose an answer

angular speed

distribution of mass

neither (A) nor (B)

both (A) and (B)

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

Choose an answer

Circular motion

Uniform circular motion

Uniform circular motion with fixed axis of rotation

Uniform circular motion with axis of rotation not defined

SI unit of kinetic energy of rotation is

Choose an answer

joule second

joule

joule second

joule meter

A satellite moving round the earth constitute

Choose an answer

An inertial frame of reference

Non inertial frame

Neither inertial nor non inertial

Both inertial and non-inertial

Ten second after an electric fan is turned on, the fan rotates at 300rev/min. its average angular acceleration is

Choose an answer

30 rad/s²

3.14 rad/s²

30 rev/s²

500 rev/s²

The angular momentum changes form 2 units to 6 units in 4s. the torque is

Choose an answer

1 unit

3/2unit

1/2unit

4unit

The time period of a geostationary satellite above the surface of the earth is.

Choose an answer

24 hours

12 hours

365 days

none of these

What happens to the centripetal acceleration of a particle, when its speed is doubled and angular velocity is halved?

Choose an answer

halved

doubled

remain unchanged

becomes four times

For a particle moving in uniform circular motion

Choose an answer

Velocity is transverse and acceleration is radical

Velocity is radial and acceleration is transverse

Both velocity and acceleration are radial

Both velocity and acceleration are transverse

If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4m. Its angular speed is

Choose an answer

4 rad. s^-1

1.6 rad. s^-1

5 rad. s^-1

2.8 ms^-1

The radius of orbit of a geostationary satellite depends upon:

Choose an answer

Mass of satellite and its time period

Mass of satellite and mass of earth

Mass of earth, mass of satellite and time period of satellite

Mass of earth and time period of earth

For a particle in circular motion the centripetal acceleration

Choose an answer

may be more or less than its tangential acceleration

equal to its tangential acceleration a

more than its tangential acceleration

less than its tangential acceleration

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:

Choose an answer

2

0.2

8

0.8

More Classes

Other Links

MDCAT Physics Chapter 3 Rotational and circular motion Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer