What force is necessary to keep a body of mass 0.8kg moving in a horizontal circle of radius 0.7m with period 0.5s.
Given:
m=0.8 kgm=0.8\:\rm kgm=0.8kg
r=0.7 mr=0.7\:\rm mr=0.7m
T=0.5 sT=0.5\:\rm sT=0.5s
The Newton's second law says
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