v^2=vo^2+2ad
30^2=10^2+2(-9.8)(d)
900=100+(-19.6)d
800=-19.6d
d=40.8
A stone is thrown upward from a bridge at a speed of 10 m/s. It narrowly misses the
bridge on the way back down, and hits the water at 30m/s. what is the approximate height of the bridge?
1 answer
1 answer