To get the gravitational acceleration by a slope board and a ticker tape. Hypothesis When the angle of the board gets 90, then the acceleration reaches at 9.
81m/s2 which is the speed of the gravitational acceleration. Apparatus A slope board, ticker tape, a car, and a tractor. Method 1. Put the board on a table or something to put over. 2. Measure the angle(starts from 1 degree, 11 degree, 22 degree, 33 degree, and 44 degree) 3. For each angle, place the ticker tape on the top of the board, and let the car go from a ticker tape as long as possible.
4.After gathering data by a ticker tape record, measure the length of every 6 dots (which is 0. 1secs consider that ticker tape works at 60Hz). 5. Make a Time-Length table to get a Time-Velocity table (for every degree).
6. Make a graph for each angle from Time-Velocity table (for every degree). 7. From the Time-Velocity graphs, get a gradient (Acceleration) of each graph and make a final table for an Angle-Acceleration graph.
8. At the final graph, the acceleration at 90 degree will be presented.Data collection & Data analysis Time-Length Table Angle Length (m) Final Angle-Acceleration Graph Conclusion & Evaluation I got the 13. 1263 from my final graph for the acceleration at 90 degree which is basically gravitational acceleration and should be 9. 81.
My final graph is not closer to the original gravitational acceleration. I may say my hypothesis is not wrong, because it’s from the error such as timing error, uncertainties error in timing or angle. I think the most affected reason is that the friction on the board when the car moves.And also I was trying to do the experiment for every 11 degrees if I could. However, it was nearly impossible to do when the angle gets over 50. If I were able to measure every 11 degrees then my final result would be closer to the value that should it be (9.