Posted by Anonymous on .
determine the period of motion when a ball dropped from a height of 4.40m makes a perfectly elastic collsion with the ground without any mechanical energy lost

science 
bobpursley,
figure the time it takes to fall
h=1/2 g t^2
t=sqrt(2*4.4/9.8)
so the period is going up, and down, so
period=2t