ECAT Pre Computer Science Chapter 5 online mcq test with answers for Physics chapter 5 (Circular Motion)

ECAT Physics Chapter 5 Circular Motion Online Test

Sr. #	Questions	Answers Choice
1	The rear wheels of an automobile are rotating with an angular velocity of 14 rev/sec which is reduced to 38 rad/sec in 5 second when brakes are applied. Its angular acceleration is:	5 rad/sec<sup>2</sup> -10 rev/sec<sup>2</sup> -10 rad/sec<sup>2</sup> -5 rev/sec<sup>2</sup>
2	A toy car moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed V of the car is:	38 m/sec 3.8 m/sec 0.6 m/sec None of these
3	A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec², then its angular velocity is rad/sec is:	22/7 7 14 21
4	Centripetal force performs:	Maximum work Negative work Positive work None of these
5	A rotating body tends to be slower, when its angular acceleration is:	Positive Negative Zero Infinity
6	When body moves along a circular path with constant speed, it has an acceleration, which is always directed;	Along the tangent Towards the centre Away from the centre None of them
7	One radian is equal to:	30.3° 45.3° 50.3° 57.3°
8	When angular acceleration is positive, the body rotates:	Slower Slowest Faster None of these
9	One radian is:	Greater than one degree Less than one degree Equal to one degree None of these
10	Centripetal acceleration is also called ______ acceleration:	Tangential Radial Angular None of them
11	Direction of motion ______ in circular motion:	Changes off and on Changes continuously Does not change None of them
12	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:	0.05 m 0.08 m 0.8 m 0.008 m
13	Angular velocity is a:	Scalar quantity Vector quantity Complex quantity None of these
14	In rotational motion, analogue of force F us called:	Couple Torque Mass Moment of intertia
15	The useful unit of angular replacement in SI unit is:	Degree Revolution Radian Metre

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