A rock is thrown upward with a velocity of 14 meters per second from the top of a 20 meter high cliff, and misses the cliff on the way back down. When will the rock be 12 meters from ground level

Question

oobleck · Answer

just solve the height equation: 20 + 14t - 4.9t^2 = 12

bleep · Answer

x=3.528311 or x=-3.528311

fred · Answer

4.96 seconds

Jada Lee · Answer

Put it in quadratic equation, so A= -4.9 B=14 C=48, X= 4.87