Question

a stone is dropped from the edge of the roof it passes ta widow in 0.1 seconds how far is the roof above top of the window

Answer 1

hello friend here is ur ans

given : time. t =0.1 s then since it is falling gravity is positive and initial velocity ,u=0 and final velocity be v , then we have
S=ut+1÷2×g×t^2
since initial velocity , u=0
therefore u×t becomes zero then we are left with
=1/2×g×t^2
=1/2×9.8×(0.1)^2
=4.6×0.1×0.1
=4.6×0.01
=0.046 m
hence the window is 0.046 m below from the roof top