By Michael B.

In Newton’s second law of motion he states that the acceleration of an object is directly proportional to the applied force and inversely proportional to the mass of the object. The formula for this law is acceleration=net force/mass. This means if you double the force then the acceleration doubles. They are directly proportional. Also if you double the mass the acceleration halves. These are inversely proportional.

This image shows that force is directly proportional to acceleration.

An example is a shopping cart that weighes 1 kg and a force of 2N is applied. If you apply double the force(4N) then the acceleration doubles. The opposite is if you double the mass then the acceleration will halve.

Image from NASA

In this photo, the man pushes the 1,000kg car and it accelerates at .05m/s/s. Since the formula is F=ma then (1,000)(.05)=F. The answer is the man pshes with 50N of force.