# A classical mechanics problem by Kushal Patankar

A small ball of mass $$m$$ is attached to the end of the string of length $$l=1 \ m$$ whose other end is fixed. From its lowest position, the ball is given kinetic energy $$\frac{mgl}{5}$$. Calculate the net acceleration $$(in m/s^2)$$ of the ball at the instant when the string makes an angle $$\theta=37°$$ with the vertical.

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