Classical Mechanics (Kibble & Berkshire) · Problem 6.3
Orbits in a central field — T.W.B. Kibble, F.H. Berkshire
Physics — Mechanics · work-energy
Problem
An athlete putts a shot of mass 7 kg a distance of 20 m. Show that the athlete must do at least 700 J of work to achieve this. [Ignore the height of the athlete and take g=10 m s−2.]