Simulation 2. Open the PHet simulation: Energy Skate Park and select \"Graphs\". Set up your initial conditions as follows: [3 Speed [3 Stick to Track - Friction None Select a mass and the shape of ramp to be used for this simulation. Record the mass below: m=_k3 Start the skateboarder at the top of the ramp and select start a. Observe what happens. What quantity (quantities) of energy is measured while the skateboarder is travelling back and forth on the ramp? Restart the skateboarder at the top of the ramp again. What type of energy does the skateboarder initially have at the top of the ramp? As the skateboarder travels down the ramp, what happens to the energy in (a)? What energy transformation takes place? What type of energy does the skateboarder have at the bottom of the ramp? What quantity (quantities) remain constant while the skateboarder travels back and forth on the ramp. Copy and complete the table below exploring how the potential and kinetic energy change as the height of the skateboarder changes. Height of Skater (m) Which is Greater (Potential or Kinetic Energy) 8. How does the skater' 5 change in speed relate to the potential and kinetic energy of the skater? Copy and complete the table below based on your observations. Which is greatest? Which is lowest? (Potential or Kinetic Energy) (Potential or Kinetic Energy) For each of the following, summarize what you have observed during this activity: relate potential and kinetic energy to the height of the skateboarder. relate potential and kinetic energy to the total energy. relate potential and energy to the speed of the skateboarder. 99'5\"?\" Problem Solving Gravitational Potential Energy For questions 1 6: 0 State the type of energy (gravitational potential or kinetic energy) involved 0 Solve for the unknown quantity making sure to list your given quantities and a therefore statement 1. Calculate the amount of energy of a 15 kg mass while sitting on a 20 m high shelf. 2. Calculate the energy of a 2 900 kg truck travelling 55 m/s along a road. 3. What distance is a 5 kg book from the floor if the book contains 195 J. 4. A car is sitting on a hill which is 20 m higher than the ground level. Calculate the mass ofthe car if it contains 636 000 J energy. 5. Calculate the mass of an object travelling 8 m/s with 16 000 J of energy. Lesson 8: Mechanical Energy 6. Calculate the velocity of a 120 kg object containing 2 160J of energy. 7. Two objects were lifted by a machine. One object had a mass of 2 kg and was lifted at a speed of2 m/s. The other had a mass of 4 kg and was lifted at a speed of 3 m/s. Show your calculations for each of the following. Which object had more kinetic energy? b. If both were lifted to a height of 10 m, which had a greater gravitational potential energy? E\