Question

Pls solve the problems in the attachment.............

Answer 1

Explanation:

YOU SHOULD GO WITH THE TRICK BECAUSE IT WILL BE LENGTHY IF YOU START DERIVATION AND ALL

ALTHOUGH YOU ARE PREPARING FOR ANY COMPETITIVE EXAMS SO U SHOULD KNOW SOME TRICKS.

FOR CENTRE OF MASS OF AN ARC

THER IS SHORT TRICK 2R sin (theta/2) /. sin (theta/2)

FROM THIS YOU WILL GET OPTION A

HOPE IT HELPS

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