David Sang Solutions for Chapter: Forces and Motion, Exercise 5: Questions

What force is needed to give a car of mass $600 kg$ an acceleration of $2.5 \raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s^2?$}\right.$

A stone of mass $0.20 kg$ falls with an acceleration of $10.0 \raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s^2.$}\right.$ How big is the force that causes this acceleration$?$

What acceleration is produced by a force of $2000\mathrm{N}$ acting on a person of mass $80kg?$

One way to find the mass of an object is to measure its acceleration when a force acts on it. If a force of $80\mathrm{N}$ causes a box accelerate at $0.10\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s^2$}\right.$, what is the mass of the box$?$