Question
a tennis ball when thrown from a height 2m horizentally,it touchs the net at a distance 15m and hits the grownd at a distance 25m . what is the heigth of the net?
Answers
bobpursley
hf=hi+vi*t-4.9t^2 vi is zero in vertical.
0=2-4.9t^2
solve for t. so horizontal velocity vi=25/t
Now with that, find the time to get to the net, t1. so at time t1, how far has if fell?
hf=2-4.9*t1^2
0=2-4.9t^2
solve for t. so horizontal velocity vi=25/t
Now with that, find the time to get to the net, t1. so at time t1, how far has if fell?
hf=2-4.9*t1^2