Potential and Kinetic Energy

Energy Energy is the ability to do work. Work is the product of force times distance. Power is the quotient of work divided by time.

How is all energy divided? Potential Energy Kinetic Energy Gravitation Potential Energy Elastic Chemical

What is Potential Energy? Energy that is stored and waiting to be used later

What is Gravitational Potential Energy? Potential energy due to an object’s position P.E. = mass x height x gravity Don’t look down, Rover! Good boy!

What is Elastic Potential Energy? Potential energy due compression or expansion of an elastic object. Notice the ball compressing and expanding

What is Chemical Potential Energy? Potential energy stored within the chemical bonds of an object

What is Kinetic Energy? Energy an object has due to its motion K.E. = .5(mass x speed2)

Pendulum A simple pendulum consists of a string, cord, or wire that allows a suspended mass to swing back and forth (oscillate). The categorization of "simple" comes from the fact that all of the mass of the pendulum is concentrated in its "bob“ (plumb bob) - or suspended mass.

Pendulum System

Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states --- a single swing (as of an oscillating body) from one extreme limit to the other and back to the start of the system.

Period of Oscillation is the smallest interval of time in which a system undergoing an oscillation returns to the state it was in at a time chosen as the beginning of the oscillation.

Transfer of Energy Through Equilibrium

Coupled oscillations --- the behavior of each pendulum (variable) influences that of the others

Compound Pendulum or Double Pendulum Write a definition using what you have learned.

Compound or Double Pendulum is a pendulum with another pendulum attached to its end, and is a simple physical system, that exhibits rich dynamic behavior, with its motion usually chaotic

Videos https://www.youtube.com/watch?v=8EpjZGYCVbw https://www.youtube.com/watch?v=d2E5oojoXjk