# Unit 7 Momentum and Energy

Plan Lecture Notes

### Learning Objective

Apply conservation of momentum and conservation of energy to solve the 2 billiard ball elastic collision problem.

Warm UP: {FM} On a notecard, write the equations for conservation of momentum and conservation of energy.

Exit Assessment: On the back of your card, describe why both momentum and energy must be conserved in an elastic collision. Sketch and annotate counter examples where 1] energy is decreased and 2] where energy is decreased. –

this ia a full line of text to see if colum width will change  if it does this may be away from the fact that colu,n width attribute hjas been deprecated in html 5

$\Large x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

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