G484 - Newtonian Laws of Motion Definitions Some revision cards of the key definitions 3.0 / 5 based on 2 ratings ? PhysicsMotionA2/A-levelOCR Created by: Lewis FCreated on: 30-12-11 09:33 Newton's First Law Define Newton's 1st Law 1 of 14 Newton's First Law An object will remain at rest or continue to travel at a constnat velocity unless acted upon by an external force. Summary No Force, No Acceleration 2 of 14 Newton's Second Law Define Newton's 2nd Law 3 of 14 Newton's Second Law The rate of change of momentum of an object is directly proportional to the resultant force acting upon said object, in the direction of the force 4 of 14 Newton's Third Law Define Newton's 3rd Law 5 of 14 Newton's Third Law When two bodies interact, the forces they exert on each other are opposite and equal. These forces do not cancel out as they act in two seperate bodies 6 of 14 Momentum Define Momentum 7 of 14 Momentum Momentum (p) is the product of an obects mass and its velocity P=mV 8 of 14 Impulse Define Impulse 9 of 14 Impulse Impulse is the product of a force and the time for which it acts. Impulse is equal to the rate of change of momentum 10 of 14 Elastic Collisions Define the term 'Elastic Collisions' 11 of 14 Elastic Collisions Elastic Collisions are when kinetic energy is conserved - momentum and total energy is always conserved. Kinetic energy before = Kinetic energy after 12 of 14 Inelastic Collisions Define the term 'Inelastic Collisions' 13 of 14 Inelastic Collisions Kinetic energy is not conserved - it is transferred into other forms such as heat. Momentum and total energy are always conserved 14 of 14

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