Physics(Please respond)
posted by Hannah on .
1) A penny is dropped from rest from the top of a very tall building. Assuming the height of the building is 407 m and ignoring air resistance, find the speed with which the penny strikes the ground.
I am not sure how to start this. Thank you!

V = sqrt(2 g X)
Why? Because
M g X = (1/2) M V^2