Our+work

= Hello 6B and Mrs McCarthy. This is matthewandwadeswork.com, a free wiki created to show Matthew Clifford and Wade Steele's very high quality work to all of you! =

Our experiment: What is the optimal height and angle of a ramp need to be to carry a toy car the furthest distance?
**Method: We built a ramp using extra thick cardboard. We placed the ramp on top of some Lego bricks, and we gradually increased the height of the ramp and the angle between the ramp and the ground by increasing the height of the Lego bricks under the ramp. We placed the car at the top of the ramp and let it go. Each time the car travelled down the ramp we measured how far it went using a tape measure. To make this a fair test we did 3 trials for each new height/angle size and found the average of the 3 distances.**

=== Hypothesis: We hypothesised that the higher the ramp and the bigger the angle between the ramp and the ground, the further the car will go. We think this is because gravity's pull will be greater. We also hypothesised that a height of about 32cm and an angle of about 50 degrees would be the best! ===

** Constraints :** **1.We predicted that we would be constrained by the angle between the ramp and the ground because if the angle is too big we thought the car would just fall off the ramp. Therefore we needed to find the optimal height for long distance travel without going so high that the distance travelled would be greatly reduced.** **2. We needed to use the same car each time. If we used a different car then it might go further or less distance then if it was with the original car.** **3. We had to use the same ramp. If we used a shorter or longer ramp the car might go a different distance or not flip at the results that it originally flipped on.**

**Trade-Offs:**
=== **1. We stopped measuring at 31cm high and 55 degrees. When we found that 38cm and 65 degrees made the car flip, we could have chosen to do a measurement like 34cm and 60 degrees but we chose not to.** ===

**Here are some photos of our experiment:** Here is us building the Lego stand || ||   ||
 * [[image:matthewandwadeswork/P9100010.JPG width="268" height="214"]]
 * [[image:matthewandwadeswork/P9100012.JPG width="276" height="336"]] || [[image:matthewandwadeswork/P9100021.JPG width="335" height="275"]] ||  ||
 * H ere is us putting the ramp on the Lego || Here is us at the end, excited with the results. ||  ||

**The table below shows our results.**
 * **Height of Ramp** || **Angle bewteen** **ramp and ground** || **Attempt 1** || **Attempt 2** || **Attempt 3**  ||  Average  ||
 * **9cm** ||  **15 degrees**  ||  **210cm**  ||  **230cm**  ||  **210cm**  ||  **216.67cm**  ||
 * **15cm** ||  **25 degrees**  ||  **410cm**  ||  **368cm**  ||  **460cm**  ||  **412.67cm**  ||
 * **21cm** ||  **35 degrees**  ||  **564cm**  ||  **513cm**  ||  **509cm**  ||  **528.67cm**  ||
 * **26cm** ||  **45 degrees**  ||  **622cm**  ||  **716cm**  ||  **608cm**  ||  **648.67cm**  ||
 * **31cm** ||  **55 degrees**  ||  **711cm**  ||  **714cm**  ||  **761cm**  ||  **728.67cm**  ||
 * **38cm** ||  **65 degrees**  ||  **Flipped at bottom of ramp and** **did not travel very far**  ||  **Previous**  ||  **Previous**  ||  **Previous**  ||

** ﻿The graph below shows that the bigger the angle between the ramp and the floor, the further the car travelled. ** **Distance** **travelled** **in cm** **Angle between ramp and floor in degrees**

Conclusion
=== We were correct in hypothesising that the higher the ramp and the greater the angle between the ramp and the ground, the further the car would travel. As you can see from these results, a height of 31cm and angle of 55 degrees was the optimal settings for the ramp. ===

**Click here to see a video demonstration of our experiment.** media type="youtube" key="8ylhg0cQPt0?hl=en" height="349" width="425"