Calculate the tension in a horizontal leather string that whirls a 0.5-kg rock in a circle of radius 1.25 m when it moves at 8 m/s while being slung around a slinger's head.

Tension in the leather string is T = 25.6 N

Explanation:

As we know that belt is revolving in horizontal circle

So the tension force in the belt will provide the required centripetal force

So we will have

now we have

L = 1.25 m

m = 0.5 kg

so we have

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