What does the membrane in the cochlea do
what is the membranes function in the ear

The cochlea detects sound and is tonotopically organized

The cochlea is the auditory sense organ within the inner ear that is responsible for hearing. The cochlea is a coiled, fluid-filled tube that is split into three chambers by two membranes, Reissner's membrane and the basilar membrane

explanation:

the masses of the objects and the distance between them

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000