# A unit mass particle is moving in a circle of radius R such that its projection on diameter executes SHM.

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A unit mass particle is moving in a circle of radius R such that its projection on diameter executes SHM. In 0.1 sec interval, particle undergoes angular displacement of 30°. Find force acting on particle at position B. If it starts from A. (R = 0.36m)

(1) 9.7

(2) 0.1

(3) 100

(4) 53.2