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Q.

A stone tied to the end of a string of 1 m long is whirled in a horizontal circle with a constant speed. If the stone makes 22 revolutions in 44 s, what is the magnitude and direction of acceleration of the stone ?

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a

Question Imageand direction along the radius towards the centre

b

Question Imageand direction along the radius away from centre

c

Question Imageand direction along the radius towards the centre

d

Question Imageand direction along the tangent to the circle

answer is C.

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Detailed Solution

As the speed is constant throughout the motion, so it is a case of uniform circular motion. Therefore, its radial acceleration  

Question Image 

Question Image 

This acceleration is directed along radius of circle towards center of circle.

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