Question

A window is 50 long. A stone is falling from a height of 40 cm above the window.find the time taken by the stone to cross the window.

Answer 1

d = (1/2) g t^2

how long to fall 90 cm = .9 m
.9 = (1/2)(9.81) t^2

how long to fall 40 cm = .4 m
.4 = (1/2)(9.81) t^2

subtract

Answer 2

3upon7