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NEWTON’S MOTION By: Per.7 ND 2 LAW OF WHAT IS IT? • Newton's second law Of Motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object. WHAT DOES IT MEAN? Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object). Acceleration of an object depends on its mass and size and direction of the force acting on it. Heavier objects require more force to move a distance, as a lighter object requires less force to move the equal distance. • The second law gives an exact relationship between force, mass, and acceleration. • F=MxA • Force = Mass times acceleration DEFINITIONS • Momentum - Characteristic of a moving body determined by the product of the body's mass and velocity. • Mass - an object is related to the force required to accelerate it and hence is related to its inertia, and is essential to Newton's laws of motion. • Velocity – The speed of something in a given direction. EXAMPLES