Question

A shopper in a supermarket pushes a loaded 36kg cart with a horizontal force of 12N. (Ignore Friction) (a) How far will the cart move in 3.5s, starting from rest? m (b) How far will the cart move in 3.5s if the shopper places an 75N child in the cart before pushing? m

Answer 1

a = F/m = 12/36 = 1/3 m/s^2
d = (1/2) a t^2 = (1/2)(1/3) (3.5)^2

for part b, use 36 + 75 instead of 36
a = 12/111