Question

a stone dropped from a window reaches the ground in 0.5 seconds: calculate its speed just before it hits the ground what is its average speed during 0.5 second calculate the height of Window from the ground

Answer 1

Since the ball was dropped, thus,
u = 0
a = g
v=u+at
v=0+gt
v= 9.8*0.5
v=4.9m/s

h=ut+1/2gt²
h=1.225m

Since, dropped avg. speed=final speed=4.9m/s

Answer 2

calculate the right of the height of window speed ground