PHET Energy of A Skateboarder Lab PDF

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Energy of A Skateboarder…… Open up Energy Skate Park at the PhET Simulations website: https://phet.colorado.edu/sims/html/energy-skate-park/latest/energy-skate-park_en.html CHOOSE Measure. The simulation has the tools to take measurements. Select a mass and keep friction off and gravity is set to earth. Record the mass here: m= _____60kg______ Collect Data: 1,Move the skateboarder to its highest point on one side. Let the skateboarder go and describe the motion. The skateboarder will ride up, then down, then up again The purple dots are points along the trajectory where the energy of the skateboarder at that position can be measured. Starting on the lefts side, use the scope and measure the potential energy, the kinetic energy, and the total energy at different positions along the trajectory. p

Potential energy (J)

Kinetic energy (J)

Total energy (J)

Highest point on left side

3425.3

34.2

3459.5

middle point on left side

1889.3

1570.2

3459.5

lowest point on left side

3.3

3456.2

3459.5

Lowest point on the right side

3.3

3456.2

3459.5

Middlle point on right side

1889.3

Highest point on right 3425.3 side

1570.2

3459.5

34.2

3459.5

Answer the following using the words increases ,decreases or stays the same 2.As the skateboarder moves down the left side of the ramp, the potential energy ___decreases______ while the kinetic energy ______increases_____ and the total energy _______stays the same__________. 3. As the skateboarder moves up the right side the ramp, the potential energy ____increases_____ while the kinetic energy ____decreases_______ and the total energy ____stays the same_________. 4. At what point is the skateboarder going the fastest?

At the very bottom

Now select the one sided ramp. Place the skateboarder at the top and allow it to roll to the bottom.(Stop the action before the skateboarder leaves the screen) Record the total energy at the top and the speed at the bottom. Total energy at top= ____3497.5______ speed at the bottom= ____10.8_______ 5. Since there is no potential energy at the bottom, all of the energy was transformed to kinetic energy. Use the formula for kinetic energy and conservation of energy to solve for velocity. Show your work and your answer. Predicted velocity____10.79_______ 6. Is the predicted velocity close to the velocity measured in the simulation? Yes: The predicted velocity was within 0.01m/s of the measured velocity Now go to the playground tab at the bottom. Use the tracks at the bottom to create a roller coaster ride. Test it with a skater. The skater should move through the contraption without going backwards, Attach a screenshot of your creation. Example:

What one rule do you need to follow in your creation in regards to the initial height?

The skateboarder would not go higher than the starting height...