Projects For Newtons Third Law. It can be expressed in the form f = ma for a body whose mass m is constant. This law explains how forces are balancedin nature by an equal and opposite force.

We can state newton’s third law as: #1 equal and opposite force acting on a person swimming in the river. Web the three laws of motion were first compiled by isaac newton in his philosophiæ naturalis principia mathematica (mathematical principles of natural philosophy), first published in.