Question

A stone is dropped from a height of 10 cm above the top of a window of 80 cm
(top to bottom of the window). Then time taken by the stone to cross from the top
bottom of the window is.​

Answer 1

Answer:

using the angle of elevation

for that ,

according to question ( atq )

when a stone is dropped from a height of 10 cm above the top of a window of 80 cm ( top to bottom of the window) then the time taken by the stone to cross when across from the top bottom to the window then angle of elevation and then using the sin theta