Question # 1

When angular acceleration is positive, the body rotates:

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Slower

Slowest

Faster

None of these

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to:

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980 N

580 N

1380 N

Zero

Circular motion is an example of motion in:

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One dimension

Two dimensions

Three dimensions

None of these

Angular velocity is a:

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Scalar quantity

Vector quantity

Complex quantity

None of these

Moment of inertia depends upon:

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Mass

Selection of axis of rotation

Both of them

None of these

When a body moves with a constant speed in a circle:

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No work is done on it

No acceleration is produced in the body

Velocity remains constant

None of these

Direction of motion _________ in circular motion

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Changes off and on

Changes continously

Does not change

None of them

Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.

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Disc, sphere

sphere, hoop

Thin rod, hoop

Hoop,disc

A body can have constant velocity when it follows:

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A circular path

A rectilinear path

Trajectory of a projectile

None of these

One radian is:

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Greater than one degree

Less than one degree

Equal to one degree

None of these

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

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3

24

126

200

In case of planets, the necessary acceleration is provided by:

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Gravitational force

Coulomb force

Frictional force

None of these

One radian is

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Greater than one degree

Less than one degree

Equal to one degree

None of these

A car is turning around a corner at 10 m/sec as it travels along an arc of a circle. If value of centripetal acceleration is 10 m/sec²in this case, find radius of the circular path:

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1 m

5 m

10 m

15 m

The useful unit of angular replacement in SI unit is:

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Degree

Revolution

Radian

Metre

A body moving along the circumference of a circle of radius R completes one revolution. The radius of a covered path to the angle subtended at the centre is:

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Radius of the circle

Twice the radius

Thrice the radius

None of these

A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is

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0.05 m

0.08 cm

0.8 m

0.008 m

Direction of motion_______ in circular of motion:

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Changes off and on

Changes continuously

Does not change

None of them

A car is turning around a corner at 10 m/sec as it travels along an arc of circle. If value of centripetal acceleration is 10 m/sec²in this case, find radius of the circular path:

Choose an answer

1 m

5 m

10 m

15 m

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ECAT Pre General Science Physics Chapter 5 Circular Motion Online Test MCQs With Answers

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