I think this because there is greater force acting on the trolley and less friction on the ramp.
Equipment
I will be using:
- Wooden ramp
- Stop watch
- Trolley
- Books to extend the height of the ramp
My Investigation
I will get a 10cm of books high for the height of the ramp then I will place the ramp on top of the books then place the trolley at the top and let go, timing how long it takes to get to the bottom.
The things that I will be measuring are the height and the distance of the ramp
ACCEL = ___AV____
Time Taken
Diagram
To make this a safe test I will have someone at the end of the ramp ready to catch the trolley as it comes off.
During this Investigation, I changed the height of the ramp by these measurements:
The Graph
I will now present my results on a line graph
Looking at my results I can easily see that the height of the ramp does affect the speed a lot as you can tell by the graphs starting at around 2 seconds and after heightening which then makes the time drop to around 1 second.
My prediction matches my results almost perfectly.
I think overall I have carried out my investigation very well having complete data and completing the tasks in plenty of time, giving me more time to check threw results for any mistakes.
In my investigation 25cm and 30 cm heights were the slower than 20cm when it should have been faster because of more height should make more force. I think that this may of occurred because of friction, different ramp, didn’t stop the stop watch quick enough due to having to use eye sight, height of the table may have also changed the results some how.
I could have done this experiment differently which could have made my results much more accurate for example using a ticker timer which would mean we wouldn’t have to use our eye sight which is sometimes inaccurate. I could of also used the same ramp all the way threw my experiment so that I would always have the same type of surface.
