top R bottom In the figure above, Alice is swinging a ball (mass 2 kg) attached to a string (radius 0.7 m) in a vertical circle. At the top of the circle the speed of the ball is 3 m/s, and at the bottom of the circle the speed of the ball is 5 m/s. (a) When the ball is at the top of the circle, calculate the tension in the string. Make sure to draw the correct free-body diagram for the ball and write out E F, = may. (b) When the ball is at the bottom of the circle, calculate the tension in the string. Make sure to draw the correct free-body diagram for the ball and write out £F, = may.

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Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.