An athlete putts a shot of mass 7 kg a distance of 20 m. Show that the athlete must do to
at least 700 joules of work to achieve this. (ignore the height of the athlete.)
2. Homework Equations [
The Attempt at a Solution
when the ball reaches maximum height, its velocity is zero. I should problem find the angle that gives the ball its maximum range. I am not sure how to find the angle that gives the ball its maximum range. maximum range is 20 meters.
.5*m*v^2=mgz ==> v=sqrt(2gz)= 20 m/s