Question

A body starts from rest and rolls down a hill with a constant acceleration. If it travels `400m` in `20 seconds`, Calcualte the force acting on the body if its mass is `10kg`.

Answer 1

Here, `u=0, s=400m, t=20s,a=?, m=10kg, F=?`
From `s=ut+1/2at^(2), 400=00+1/2a(20)^(2), a=2m//s^(2)`
From `F=ma= 10xx2=20N`