Question

To estimate the height of bridge over a river a stone is dropped freely in river from a bridge .The stone 2s to touch the water surface in water calculate the height of bridge from water level (g =9.8m/s 2)
b.) how is the force of attraction depend on the mass of object and distance between them ​

Answer 1

Answer:

s=ut+0.5at2=0(t)+0.5(9.8)(2)2

s=19.6m