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

\fA 335 kg box is pulled 5.00 m up a 300 frictionless, inclined plane by an external force of 5325 N that acts parallel to the plane. 1 Calculate the work done by the external force. I" TOOLS 3! Calculate the work done by gravitj X10 Calculate the work done by the normal force. A 7900-metric ton freight train is out of control and moving at 93 km/h on a level track. How much work W must a superhero do on the train to bring it to a halt? W =How much additional potential energy AU is stored in a spring that has a spring constant of 13.5 N/m if the spring starts spring 10.0 cm from its unstretched length and ends up 14.0 cm from its unstretched length? A USPring = :] J I TOOLS x10? A "JO-kg professional cyclist is climbing a mountain road at an average speed of 21.9 km/h. The road has an average slope of 35 and is l 1.5 km long. If the cyclist's power output averages 350 W over the duration of the climb, how much energy E does he expend? Part I: - First, select the Intro simulation to begin. - Check the box to display the Bar graph. Keep the parabolic ramp selected and press the pause button to stop the skater from automatically moving down the ramp. - Place the skater onto the top right side of the ramp and then press play. Let the skater move back and forth along the ramp and take note of what happens to the energy in the bar graph. Part II: Next, change from the Intro tab to the Friction tab. Check the same boxes as before, and keep the same ramp conguration. Make sure to press pause. This time. slide the friction bar to lots and position the skater the same as in Part |. Let the simulation play until the skater comes to a complete stop. Take note of the energy again. - Repeat the simulation again, this time sliding the mass bar to large. Questions: Part I: 1. When is the potential energy the greatest? A. At the top of the ramp B. At the bottom of the ramp C. In the middle of the ramp D. There is no potential energy 2. Does the total energy ever change? Yes or No Part II: 1. Does the change in mass affect the value of the total energy? Yes or No 2. What causes the increase in Thermal Energy? A. Gravitational Force B. Force due to Friction 3. Which best describes the energy over time? A. The total energy decreases over time. with the thermal energy becoming greater than the total energy when the skater stops moving. B. There is a constant kinetic, potential, and total energy. The thermal energy increases over time. C. Both kinetic and potential energy decreases over time, the thermal energy increasing. The total energy remains constant. D. The kinetic energy remains constant but the potential energy decreases. Thermal energy increases and the total energy decreases