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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