With both F and a vectors in the same direction (denoted here in bold face).

Or in the form usually found in textbooks

The acceleration a is in the direction of the force and proportional to its strength, and is also inversely proportional to the mass being moved.

When a force is applied to an object, it accelerates.

In the absence of forces, ('body') at rest will stay at rest, and a body moving at a constant velocity in a straight line continues doing so indefinitely.

This section discusses two concepts on which they are based: Force and Inertiaįor later reference, Newton's three laws are listed below the way they are usually formulated : 'Newton's three Laws of Motion' are the foundation of the theory of motion-e.g., of orbits and rockets. God said:'Let Newton be!' and all was light. Nature and Nature's laws lay hid in night No wonder that the poet Alexander Pope, who lived in Newton's time, wrote: It may be fairly stated that Newton was the first to solve all three. Three problems intrigued scientists in Newton's time: the laws of motion, the laws of planetary orbits, and the mathematics of continuously varying quantities-a field nowadays known as calculus. The one thing about which everyone agrees is his brilliant talent. He never married, and his personality continues to intrigue scholars to this day: secretive, at times cryptic, embroiled in personal quarrels with some scholars yet generous to others, bestowing his attention not just on physics and mathematics, but also on religion and alchemy. Almost all his creative years were spent at the University of Cambridge, England, first as a student, later as a greatly honored professor.

Isaac Newton was born in 1642, the year Galileo died.

Newton vs. timenet forces