posted by John .
A 35kg child is swinging on a swing with length 2.8m to the bottom of the seat. At the highest point of the swing, the rope makes an angle of 42 degrees from vertical. Calculate the speed of the child at the bottom of the swing. Assume no thermal energy is created. Calculate the force the child exerts on the seat at the bottom of the swing.
at 42 degrees, the change in height of the swing = 2.8*(1-cos42)
speed at bottom=above height*mass*g
forceatbottom=masschild*V^2/2.8 + masschild*g