Timmy is playing by a well and drops in a rock. After 6.0 seconds, the rock hits the water below. What is his velocity

Answer 1

If you are asking what the velocity of the rock is, it can be calculated by multiplying the acceleration due to gravity (aka "g" which is 9.8 m/s²) and the time (6 sec) so:

9.8•6 = 59 m/s