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Conservation of Energy

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Conservation of Energy

- Kinetic Energy should equal Potential Energy.
- What do you expect to happen when you drop a ball from a surface to the ground?
- What should happen to your potential energy?
- How should your potential energy compare to your kinetic energy?

- Mass
- Gravitational acceleration (9.8m/s2 )
- Height/distance

- Measure the mass of the softball.
- Measure the distance from the floor to the top of the counter/table/chair (whichever you decide to drop them from).
- Calculate Potential Energy.
- GPE = mgh

- Remember energy is calculated in Joules!

- KE= ½ mv2
- If KE=PE, take the number you calculated for GPE and substitute it in this equation. Predict the velocity of the softball when you drop it.

- Mass
- Velocity
- Step 2:
- Drop the ball.
- Time how long it takes to drop.
- Record the Time.
- Calculate Velocity (m/s).

- Calculate Kinetic Energy
- KE= ½ mv2
- Compare your Kinetic Energy to your Potential Energy.
- Calculate the difference between the values.

- How did your predicted velocity compare to your actual velocity?
- How big of a difference was there between kinetic energy and potential energy?
- What do you believe caused this difference?