Use the following link to answer.

https://phet.colorado.edu/sims/html/energy-skate-park/latest/energy-skate-park_en.html

Hit the "pause" button (lower middle) and "Restart skater". Now change the gravity to a low value near but not quite zero. a.) Under lower gravity, how is the motion changed? b.) Under lower gravity, what happens to the energy? Is it still conserved? Now change the gravity to a value near Lots. a.) Under higher gravity, how is the motion changed? b.) Under higher gravity, what happens to the energy? Is it still conserved?3 Calculating Energy Hit the Reset outton. Turn on the energy graph and check the box fer Grid a} Hon.r can you compute the total energy ofthe skater by using the Measuring Tape [see figure on right: you can drag it) or Grid option? What other values do L.+ + you need for your calculation? Experiment to find how to display them in the simulation and list them here. What is the value of the energy {in Joules} for your setting? c} What is the maximum speed of the skater for your setting? 4 Potential Energy Reference a} Using the default setting, at some moments the kinetic energy is zero but the potential energy does not go to zero. Why? Is it possible for the potential energy to be zero? Explain b} Experiment to figure out hGW to turn on a blue dashed horizontal line. What is the meaning of this line? c} Grab the blue dotted line 1lyith the mouse and move it around. What is the effect on the kinetic energy? What is the effect on the potential energy? What is the effect on the total energy? ls mechanical energy conserved? Explain. 5 Friction Every real skateboard has some friction so to make the simulations more realistic, turn on the track friction to a low value. Make sure the energy graphs are on and observe the energy during consecutive runs of the skater.a} What is the effect of friction on the total energy\"?I is} What is the effect of friction on the potential and kinetic energy? C} Is energy conserved? d} Do you notice anything interesting about the pattern of hoyur the energy is dissipated (that is turned into heat or thermal energy) during the motion