A ball of mass 50 g attached to a string is in circular motion, on a horizontal

Question

A ball of mass 50 g attached to a string is in circular motion, on a horizontal frictionless surface, as shown in the figure. If the tension in the string is 80.0 N and the length of the string is 110.0 cm, what is the magnitude of the tangential velocity

A ball of mass 50 g attached to a string is in circular motion, on a horizontal frictionless surface, as shown in the figure. If the tension in the string is 80.0 N and the length of the string is 110.0 cm, what is the magnitude of the tangential velocity

Explanation / Answer

tention = centrepetal force = mv^2/r

m = 50gms = 0.05 kg

r = 110cms = 1.1m

so 80 N = 0.05*v^2/1.1

so v = 41.95 m/s

tangential velocity = 41.95 m/s

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