A 2.2kg mass is whirled in a vertical circle of radius 1.8m at a uniform constant speed. calculate this speed if the minimum tension in the rope is 9.5N.
"mg+N=m\\frac{v^2}{r}\\to"
"v=\\sqrt{\\frac{(N+mg)r}{m}}=\\sqrt{\\frac{(9.5+2.2\\cdot 9.8)\\cdot1.8}{2.2}}=5(m\/s)" . Answer
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