A net force of 10 Newtons acts on a box which has a mass of 2 kg. What will be the acceleration of the box?
This is about as straightforward as it can get - Newton's Second Law says that the acceleration of an object equals the net force on it divided by its mass:
Note that if the net force is in Newtons and the mass is in kilograms, the acceleration is in m/s2. Why? Here's a way to think about it. The force "1 Newton" is defined to be the amount of force that will accelerate an object of mass 1 kg at 1 m/s2.
How much horizontal net force is required to accelerate a 1000 kg car at 2 m/s2?
Newton's 2nd Law relates an object's mass, the net force on it, and its acceleration: