Question

I. OBSERVATIONAL EXPERIMENT: WHAT DETERMINES KINETIC ENERGY OF A CAR GOING DOWN THE TRACK? Available equipment: Computer with spreadsheet software. a) An experiment was conducted by placing the car on the track as shown in the figure below. In this experiment we let the car went and record the location where it has landed on the floor. The steepness of the track was changed but released the car from the same height above the table. The experiment was repeated three times at each steepness to make sure the car lands reliably (same location) on the floor. The results are presented in the table below. 0- Farth Earth Trial # Height (cm) Distance (cm) 2 3 4 5 6 7 8 9 Degree of inclination (degree) 20 20 20 25 25 25 28 28 28 25 25 25 25 25 25 25 25 25 69 67 69 70 70 69 71 68 68 b) What pattern do you find? Discuss with your group members how you can explain this pattern using your knowledge of gravitational and kinetic energy. Provide your group's explanation. c) Represent the pattern with a work-energy bar chart (before you proceed with the bar chart agree with your group members on the choice of a system, initial and final states for your analysis). I need help with all please

These are the answers ^^ i need help with the ones below

Answer 1

1:- In the above experiment our purpose is to show that the change in gravitational potential energy depends only on the difference of heights from the ground not on the path. Like in this experiment even though we change the inclination angles but still we get almost the same velocity at the end of the roller and cars drops nearly the at same distance in each observation. In this we try to find the distance of car after release from roller from same height with different different inclination angles and we observe that the distance is nearly the same each and every time we release the car. This shows that change in gravitational potential energy depends on the corresponding heights from the ground.

2. In the data table we check the distance at which car falls and we find it nearly same in every observation from different incline angles but from same height.

3.Intially at the Height ,h, where we held the car at roller the potential energy is maximum and their is no kinetic energy . When we release the car then kinetic energy increases with same amount as the potential energy decreases. Gain in kinetic energy is equal to the loss in potential energy and every time we release the car from same height so at end of roller loss in potential energy is remains same and gain in kinetic energy at end of roller remains which results the same falling point of car on the ground.

4. Same as in part c answer.