M2 - Unit 3 Flashcards
How to find the work done using KE and PE (if a force other than gravity is acting on particle)
W = KE lost - PE gained
Energy is measured in what?
Joules (J)
When is kinetic energy greater?
When the object is faster or heavier
When is potential energy greater?
When the object is heavier or held higher
Kinetic Energy using mass and velocity
KE = 1/2 mv^2
Potential energy using mass and height
PE = mgh
Work done using final kinetic energy and initial kinetic energy
W = 1/2 mv^2 - 1/2 mu^2
How do kinetic energy and potential energy link if gravity is the only force acting on the particle
Decrease in potential energy = increase in kinetic energy
What is the total loss of energy if there is another force other than gravity acting on a particle
Total loss of energy = kinetic energy lost - potential energy gained
