I need help with questions 20-25 please

1. Note that gravity in this lab is 9.8 m/s2 2. Select the filing cabinet for the object on the ramp. 3. Leave the position equal to 10 m (bear in mind that this is not the top of the ramp). 4. Change the angle to 100.

Part A:

5. Calculate the height above the ground at position 10 m: 1.73

6. Minimize the force graph and open the energy graph.

7. The simulation will run when you select "frictionless". Pause it just before the filing cabinet reaches the bottom of the ramp.

8. Read off the simulation graph the following energy values:

Kinetic Energy (Top): 0.00

Potential Energy (Top): 1701.75

Total Mechanical Energy (Top): 1701.75

9. Based on the above data (see question 8), what should the energy values be at the bottom of the ramp:

Kinetic Energy (Bottom): 1701.75

Potential Energy (Bottom): 0.00

Total Mechanical Energy (Bottom): 1701.75

Part B 14. Reset the simulation. Minimize the energy graph and open the work graph. 15. Read off the chart before you run the simulation: Work done by gravity = -1701.75 J 16. Show how you can calculate this value: Wg m x g x h x cos180 = 1701.75 x (-1) =-1701.75 J 17. If the work done by gravity already has a value for the filing cabinet sitting at rest on the ramp, what can we assume happened to give it this value? (We would think it would be zero before we start the simulation) Hight bottom= 0 WORK ENERGY THEOREM Page 4 Wg = m x g x h(bottom) x cos180- 0 18. Calculate the weight parallel to the ramp. Angle of the ramp = 10degrees WE = m x g x sin10 - 983.67 x sin10 = 170.81N 19. What distance would you multiply with the weight parallel to get the work done by the weight? Distance multiplied by the length of the ramp that is 10 m with Wr. To get work done by weight 20. Calculate the work done by the weight. I 21. Click frictionless to run the simulation and pause it when the cabinet reaches the bottom of the ramp. 22. Read off the graph: work done by gravity =-154.86 J 23. How did the work done by gravity become this value? 24. How does the work done by gravity on the box compare to the energies of the box (think about the formulas we know)? 25, Write down your General Observations and Conclusion