posted by Anonymous .
were are doing free fall right now in the class
the question is
A worker drops a wrench form the top of a tower 80.0m tall. What is the velocity when the wrench strikes the ground?
I know that the change of distance 80.0m
I know aceleration of free fall is -9.81m/s^2
but I don't think that I have enough information to find the velocity final because I don't know the velocity initial I'm completly lost