A 47 kg child on a 1.5 m long swing is released 5 from rest when the swing supports make an angle of 22 ◦ with the vertical. the acceleration of gravity is 9.8 m/s 2. if the speed of the child at the lowest position is 1.30868 m/s, what is the mechanical energy dissipated by the various resistive forces (e. g. friction, etc.) ? answer in units of j.
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