Today,

Go over Energy Project Assignment

MECH ENERGY Done by Feb break?

Introduction to Mechanical Energy Changes.

CW/HW: Energy Problems

Energy Changes

Example of Mechanical Energy Changes:

I take a spring loaded dart gun and fire it into the air. I push on the 0.1 Kg dart with 3 Newtons of force.

What type of energy does it have at each point in its journey?

ENERGY CHANGES ….. IF no friction/heat

Δ ME = Δ ME

Start Finish

GPE + KE + EPE = GPE + KE + EPE

mgh + 1/2mv² + 1/2kx² = mgh + 1/2mv² + 1/2kx²