(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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. Relevant equations[

E=T+V

Work=T2-T1

3. 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

R cos(theta)=v*u/g

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# Homework Help: Conservation of energy problem involving a projectile.

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