A father skating pushes a baby in a cart over a distance of 100m. The father starts from rest and wants to reach a speed of 5.0m/s, How hard does the father need to push in the direction of the motion? The cart has a mass of 10.0kg and the baby is 8.0kg.

Answer 1

Wouldn't it depend on friction? Of course it depends on friction.
Now if one were to disregard friction, as on ice, of course dad could not push the cart at all. Ignoring even that..
netforce=mass*acceleration or a=F/m
vf^2=vi^2+2ad=vi^2+2(F/m)d solve for force F.

Answer 2

oh sorry forgot the important part LOL uhm it says to NEGLECT friction