Newtons 2nd law of Motion
A truck accelerates down the road at 20 m/s2
a force of 40,000 N is applied to slow it down. This is the mass of the truck.
A plane has a mass of 5,000 kg, it accelerates at a rate of 2,000 m/s2 to lift off the ground. This is how much force was applied.
What is 3 m/s2?
Forces that do not cause a change in the motion of an object are considered this.