Physics MCQs

Page No. 30

A stone is whirled in a vertical circle at the end of a string. When the stone is at the highest position the tension in the string is______________?


aMaximum


b Zero


cEqual to the weight of the stone


d Less than the weight of the stone



When a body moves in a circle of radius r with linear speed V its centripetal force is_______________?


amV/r2


bmV/r


cmV2/r


dmV2/r2


View Answer mV2/r

Centripetal force performs_______________?


aMaximum work


bMinimum work


c Negative work


dNo work


View Answer No work

When a body is whirled in a horizontal circle by means of a string the centripetal force is supplied by______________?


aMass of a body


bVelocity of body


cThe tension in the string


d Centripetal acceleration



The relation between linear and angular acceleration is______________?


aa = a x r


ba = r x a


ca = a x r


dr = a x a


View Answer a = a x r

The circumference subtends an angle________________?


aπ radian


b 2π radian


cπ/2 radian


d4π radian


View Answer 2π radian

hen a body moves in a circle, the angle between its linear velocity and angular velocity is always_______________?


a180°


b


c90°


d45°


View Answer 90°

The direction of the linear velocity of a body moving in a circle is______________?


aalong the axis of rotation


balong the tangent


cdirected towards the centre


ddirected away from the centre


View Answer along the tangent

The period of a circular motion is given by_______________?


aT = πv


bT = πw


cT = 2πr


d T = 2πr/v


View Answer T = 2πr/v

One radian is equal to______________?


a 67.3°


b57.3°


c87.3°


d60°


View Answer 57.3°

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