NATS 1840 Lecture Notes - Lecture 8: Kinetic Energy
9 Oct 2016
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Motion: objects in motion remain in motion unless a force acts upon it to stop it. You don"t need a force to keep it moving: if an object is moving at a constant speed, there is no force acting upon it. What is energy: a moving object will act on a stationary one (if they collide) chasing its state of a motion (speed, direction), it does work on the non-moving object, the collision could also break either object. Work is done when matter moves (or changes its state of motion) as a result of the application of a force upon it. Energy is the ability of a system to move matter through some distance, to do work. Power rate at which energy is consumed or received or delivered: power = energy/time. 1 j = 0. 239 calories: 1 calorie = energy needed to raise temperature of 1 gram of water by 1 degree c =
