Newton's first law states, "Every object persists in its state of rest or uniform motion in a straight line unless it is compelled to change that state by forces impressed on it." A more colloquial way of saying it is "an object in motion stays in motion."
Newton's first law, one of his three laws of motion, describes inertia. For example, if a ball is set in motion, it keeps going unless a force stops it from going farther. A number of forces could stop it, such as friction as the ball rolls across the surface. Other things could make it go faster, such as a fan blowing behind it or gravity pulling it down a slope. Similarly, an object that is not moving stays still unless something acts upon it to move it, such as a cat's paw swiping at the ball. Newton describes how velocity changes in his second law.Learn More
Newton's law of universal gravitation states that the force of gravity is a universal force between all objects proportional to both masses and the square of the distance between them. This law can be expressed with the equation F₁₂ (m¹ * m²) / d².Full Answer >
According to Isaac Newton's second law of motion, acceleration is produced when a net force acts on a mass. The net force is the sum of all the forces acting on the mass.Full Answer >
Newton's second law of motion is Force = Mass x Acceleration. What this states is that the acceleration of an object is dependent upon two variables, which are the net force acting upon the object and the mass of the object.Full Answer >
Newton’s Third Law of Motion states that for any action, there is an equal and opposite reaction. In terms of force, the Third Law of Motion states that for every force, there is a reaction force that is equal in size and opposite in motion.Full Answer >