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Pie C Speed Par Shoko Track II VUUS Setup Intro Choose the intro option once you click the link Check the speed box on the menu on the right Keep "stick to track selected, the u/v shaped track, no friction, the default gravity setting, and a mass of 60 kg Expand the energy bar graphs in the top left Friction Nome Gravity Try Loh Energy Mass + Energy Now, move on to the questions
Kinetic and Potential Energy @ * © + Click and drag the skater to about halfway up one side of the track. Release her and observe her movement, her speed, and the energy bar graphs. As she moves down the track, what happens to her speed? Increases? or decreases? As she moves down the track, what happens to her kinetic energy? Increases? or decreases? As she moves down the track, what happens to her potential energy? Increases? or decreases? As she moves down the track, what happens to her total energy? Increases? or decreases? As she moves up the track, what happens to her speed? Increases? or decreases? As she moves up the track, what happens to her kinetic energy? Increases? or decreases As she moves up the track, what happens to her potential energy? Increases? or decreases? As she moves up the track, what happens to her total energy? Increases? or decreases?
2 Kinetic energy practice As the skater's speed increases, the kinetic energy bar Increases? Or decreases? Kinetic energy, KE = \*mºv? mis mass in kg, and vis speed in m/s. Kinetic energy is measured in Joules (J) 1. Ifa 20 kg dog is running 5 m/s, what is its kinetic energy in Joules? Answer here 2. If the 20 kg dog is just walking at 2 m/s, what is its kinetic energy in Joules? Answer here 3. If a 1000 kg car is traveling at 30 m/s, what is its kinetic energy in Joules? Answer here If a 1500 kg car is traveling at 30 m/s, what is its kinetic energy in Joules? + Answer here
Comparing the effect of height and mass on gravitational potential energy Release the 60 kg skater from the middle of the Release the 60 kg skater from the top of the track as before, then pause, and release the 60 track, then pause her motion at the top. kg skater from the top of the track Increase her mass to 100 kg. Observe the change in the total energy and potential energy Summarize: As mass increases, gravitational potential energy Which release point gives the skater more total energy? Increases? or decreases? Middle? or Top? O + When you drop the skater, all of the energy is potential energy at first. Summarize, as height increases, gravitational potential energy Increases? or decreases?
Gravitational Potential Energy practice Gravitational Potential energy, PE = m*gth mis mass in kg, and g is 9.8 m/s/s, h is the height above the objects lowest position. PE is measured in Joules 1. Ha 5 kg backpack is on bleachers 3 m high, what is its potential energy in Joules? Answer here 2. If a 2 kg textbook is on my desk 1.2 m high, what is its potential energy in Joules? Answer here 3. If a sled has 400 J of potential energy when it is on a 2 m high hill, what is its mass in kg? Answer here At what height will a 500 kg roller coaster cart have 250,000 J of potential energy? Answer here 4.