with what minimum speed must you toss a 160 g ball straight up to just touch the 13-m-high roof of the gymnasium if you release the ball 1.4 m above the ground? solve this problem using energy.
energy at top = m*g*height at top from release point =0.16*9.81*11.6 =18.21J At release kinetic energy= Gravtiational energy at top 1/2*0.16*v^2=18.21J v^2=227.625 v=15.10m/s
