Question

state and derive second law of motion .Why are we less hurt if we fall from a height on to a sand heap than on a concrete floor​

Answer 1

Explanation:

here is what I found for you.

is hurt less when we fall on a sand heap in comparison to concrete floor because sand heap has a smooth surface than concrete floor.

Answer 2

Explanation:

as already explained by above Author , concrete absorbs momentum at Sudden rate , where as San particles immediately gain momentum and reduce impact Time.

a = (v-u)/t

ma = F = ( mv -mu) / t= dP/dt

Force of Impact = Change of Memnetum over Time.

since Sand has Higher dt , dp/dt is lower and hence Impact Force. above given Answer by othe User is Perfect.