Question

A stone is thrown vertically upwards with a velocity of 40m/s.
a) At what height will its kinetic energy and potential energy be equal
b) Calculate the P. E. of the body if its mass = 10Kg

Answer 1

V=40m/s a.) P.e.=k.e. mgh=1/2*m*v*v gh=1/2*40*40 h=1/2*40*40/9.8 H=81.632m b.) M=10kg G=9.8m/s H=81.632m P.e.=mgh=10*9.8*81.632 P.e.=8000J(approx.)

Answer 2

see the attached document .........
 i hope it helps..................

818017eb52c8ea0559b51e1517666893.docx