Problem 6-23 Centripetal force - D

A child has tied a piece of wood of mass $0.47\; kg$ to a string and is swinging it in a vertical circle of radius $83\; cm$. At the top of the circle:

(a) draw a free body diagram for the wood,
(b) determine the magnitude of the tension in the string, if the speed of the wood is $3.7 \;m/s$.

No. The tension in the string is only one force acting toward the centre.

Try again.