ECAT Pre Computer Science Chapter 5 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 5 Circular Motion

Try The MCQ's Test For ECAT Physics Chapter 5 Circular Motion

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ECAT Physics Chapter 5 Circular Motion

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Question # 1

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

Question # 2

Centripetal acceleration is also called ______ acceleration:

Question # 3

The useful unit of the angular displacement in SI unit is:

Question # 4

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

Question # 5

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

Question # 6

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of

Question # 7

One radian is:

Question # 8

Which one is related to angular motion:

Question # 9

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of:

Question # 10

Direction of motion _______ in circular motion

Question # 11

Conventionally the angular velocity is directed at an angle of

Question # 12

Moment of inertia depends upon:

Question # 13

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:

Question # 14

Centripetal acceleration is also called _______ acceleration:

Question # 15

One radian is equal to:

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ECAT Physics Chapter 5 Important MCQ's

Sr.# Question Answer
1 A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be:
A. 8.1 X 107N
B. 625 N
C. 6250 N
D. None of these
2 A stone is tied to the end of a 20 cm along string is whirled in a horizontal circle.
if centripetal acceleration is 9.8 m/sec2, then its angular velocity in rad/sec is:
A. 22/7
B. 7
C. 14
D. 21
3 Direction of motion _________ in circular motion
A. Changes off and on
B. Changes continously
C. Does not change
D. None of them
4 Direction of motion ______ in circular motion:
A. Changes off and on
B. Changes continuously
C. Does not change
D. None of them
5 Radian is defined as the angle subtended at the center of a circle by an arc of:
A. Length equal to its diameter
B. Length equal to its radius
C. Any length
D. None of these
6 Direction of motion _______ in circular motion
A. Changes off and on
B. Changes continuously
C. Does not change
D. None of them
7 ______ plays the same role during angular motion as played by the mass in linear motion
A. Torque
B. Angular Momentum
C. Moment of a force
D. Moment of inertia
8 If a gymnast is sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will:
A. Increase
B. Decrease
C. Remains constant
D. None of these
9 The rear wheels of an automobile are rev/sec which is reduced to 38 rad/sec in 5 seconds when brakes are applied. Its angular acceleration is:
A. 5 rad/sec2
B. -10 rav/sec2
C. -10 rad/sec2
D. -5 rav/sec2
10 Centripetal acceleration is also called ______ acceleration
A. Tangential
B. Radial
C. Angular
D. None of them

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