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Physics Ch. 5

QuestionAnswer
When is work done? When a force is applied to an object and it moves that object.
What is work? Work is the energy transferred when a force is applied to an object.
What is the SI unit of work? Newton meter or Joules.
Work is done only when... Components of a force of parallel to displacement.
Force that causes a ________ of an object does _________ on the object. Displacement; Work.
What kind of work do forces in the direction of motion have? Positive work.
What kind of work do objects at rest have? No work.
What kind of work do forces that opposes motion have? Negative work.
What kind of work do forces with 90 degrees to motion have? No work.
Define kinetic energy. The energy of an object due to its motion.
What kind of quantity is kinetic energy? Scalar.
What is the SI unit for kinetic energy? Joules.
What is the SI unit for gravitational potential energy? Joules.
Define elastic potential energy. The potential energy in a stretched or compressed elastic object.
Define law of conservation. Energy is conserved.
True or false: Mechanical energy will change (ME initial does NOT equal ME final). False.
Define power. The rate at which energy is transferred.
What is the SI unit for power? Watt (W) or Joule/second.
Created by: OliviaRoark
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