Physics MCQs

Page No. 29

In an angular motion, Newton’s second law of motion is_____________?


aF=ma


b F=τp/It


cΣτ = I α


dAll above


View Answer Στ = I α

If a wheel of radius r turns through an angle of 30° then the distance through which any point on its rim moves is______________?


aπ /3 x r


bπ/6 x r


cV/30 x r


dπ / 180 x r


View Answer π/6 x r

A cyclist cycling around a circular racing track skids because_____________?


athe centripetal force upon him is less than limiting friction


bthe centripetal force upon him is greater than limiting friction


cthe centripetal force upon him is equal to the limiting friction


dthe friction between the tyres of the cycle and road vanishes



When a wheel 1 m in diameter makes 30 rev min the linear speed of the point on its rim in ms-1 is_______________?


a


bπ/2


cπ


d20π


View Answer π/2

The angular speed for daily rotation of the earth in rad S-1 is______________?


a7.3 x 10 radians/second


b 7.3 x 5 radians/second


c3.7 x 10 7.3 x 5 radians/second


d7.3 x 10-5 radians/second



A body moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R the ration of displacement to the covered path will be_____________?


aπR


b2π R


c0


d4πR


View Answer 0

A body can have constant velocity when it follows a_____________?


aElliptical path


bCircular path


cParabolic path


dRectilinear path


View Answer Rectilinear path

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


a4 rad. S-1


b5 rad. S-1


c1.6 rad. S-1


d2.8 ms-1


View Answer 5 rad. S-1

In case of planets the necessary acceleration is provided by______________?


aGravitational force


bFrictional force


cCoulomb force


dCentripetal force


View Answer Gravitational force

The span of the broad jump depends upon_______________?


aMass of the jumper


bHeight of jump


cAngle of projection


dNone


View Answer Angle of projection

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