Question

a stone dropped novel hits the water surface after 2 seconds what is the depth of the well and with what speed will the stone hits the water surface is in the uniform acceleration due to gravity is 9.8 metre per second square

Answer 1

depth=1/2at^2=1/2 ×9.8×2^2=19.6m
velocity =u+at=0+9.8×2=19.6m/s