A particle is released from rest with a taut horizontal string of length R, the other end being fixed. Immediately after release, the tension in the string is:
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A particle is released from rest with a taut horizontal string of length R, the other end being fixed. Immediately after release, the tension in the string is:

G1 Physics · Accepted Answer

Immediately after release v=0. At the horizontal position gravity has zero radial component, so radial equation gives T=mv²/R=0.