54) A conical pendulum has length 100 cm and a bob of mass 100 gm is suspended from it. when the bob is set swinging in horizontal circle it makes 10 revolution in 15 sec,find
a) radius of circular path
b) tension in string

The time period T=1015sWe know    acceleration a=-ω2r,  where r is the radius of the circular path. of S. H. M.i)  So         r=aω2=aT24π2=10×10×104π2×15×15=2018π2ii)  Tension in the string   T = mg=0.1×10=1N.

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