A 30 kg child is playing on a swing. Another child is pushing. That second child does 75 J of work on the swing. Ignore friction. The swing has zero mass compared to the child on the swing. There is a diagram. So basically: Postion A Height = .6 m. Position B Height = .2 m and Postion Height C = ? a. How much kinetic energy does the child on the swing have at position A just after the push? Work = change in kinetic energy. So I did 75=.5(30)(v2)-.f(30)(0) to get velocity (I assumed the initial velocity is 0) And then I was gonna plug that into KE = .5mv2. Is that right? c. What is the maximum speed of the child on the swing? d.What is the maximum height off the ground the child on the swing reaches following the initial push. Part b is the total energy at positions B and C. I can figure that out. I'm really just confused about c, and I want to know if that is how to do a. Please help!