A 1 kg particle attached to a string of length 1 m has speed √(30) m/s at a point where the string is horizontal. Take g=10 m/s². If tension there is N newton, find N.
Physics · Work , Power and Energy · vertical circular motion
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Question

A 1 kg particle attached to a string of length 1 m has speed √(30) m/s at a point where the string is horizontal. Take g=10 m/s². If tension there is N newton, find N.

G1 Physics · Accepted Answer

At the horizontal position gravity has no radial component. Therefore T=mv²/R=1×30/1=30 N.