Perfectionist Posted October 16, 2014 Report Share Posted October 16, 2014 Hi there, So soon I'll be starting on my first Internal Assessment in physics. I need some suggestions for an experiment / investigation I'll be completing in regards to: Rubber Bands, or Elastic Bands, whatever you like to call them. If it's possible, suggest something that would be rather easy to out take, with a few variables, you could suggest it in a form of a investigation question. – Thank You! Reply Link to post Share on other sites More sharing options...
Sofia. Posted October 16, 2014 Report Share Posted October 16, 2014 You're supposed to identify the relevant dependent and independent variables yourself, that's part of the assessment criteria. What usually helps me is thinking about what factors is going to affect whatever you're supposed to investigate - just list everything that comes to mind and find two that relate to each other. Then think of how you can test that relationship In this case, elastic bands are (obviously) elastic. Is there something you can do with that? (I always liked shooting elastic bands when I was little. Totally unrelated to your IA, of course) 1 Reply Link to post Share on other sites More sharing options...
Perfectionist Posted October 17, 2014 Author Report Share Posted October 17, 2014 Thanks for the reply, how about something to do with, Investigating the relationship of Hooke's law to elastic bands. For example, adding weights to several trials of elastic bands, to see where the breaking point initiates. Have you got any ideas or clues as to what may be a fun experiment to do with elastic bands? Reply Link to post Share on other sites More sharing options...
Sofia. Posted October 17, 2014 Report Share Posted October 17, 2014 Wouldn't the breaking point be the same for every trial, if you're using the same elastic band? That is, you'll find a number of grams for which the elastic band breaks. That could probably work, but physics IAs are usually more concerned with relationships than numbers - what is the relationship between how far you pull back the elastic band (force) and how far you can shoot it (distance), for example. 1 Reply Link to post Share on other sites More sharing options...
Perfectionist Posted October 18, 2014 Author Report Share Posted October 18, 2014 Thats a good one, although how would you measure force, would you just measure it in regards to how far you pull back? Reply Link to post Share on other sites More sharing options...
Sofia. Posted October 18, 2014 Report Share Posted October 18, 2014 Possibly easiest to use a force meter to pull back the elastic band Your school should have one, I hope. If you pull straight back and shoot the band straight, that should work. Reply Link to post Share on other sites More sharing options...
Perfectionist Posted October 19, 2014 Author Report Share Posted October 19, 2014 True^ however, since it'll be hard to pull and shoot the elastic band on the force meter, would it be a good idea to measure how far i pull back, while the elastic band is ont he force meter, then discard the force meter and just do it with my hand. Also what are some of the things which would be regarded as the extraneous variables. Thank you so much for your assistance! Reply Link to post Share on other sites More sharing options...
Sofia. Posted October 19, 2014 Report Share Posted October 19, 2014 Yes, that would definitely work Hm, your controlled variables would be things such as angle of release, elasticity of the rubber band, height over the floor etc. You can probably find a few more though. 1 Reply Link to post Share on other sites More sharing options...
Perfectionist Posted October 19, 2014 Author Report Share Posted October 19, 2014 Wow, thanks so much for the ideas, and would it be ok if i message you in the future in regards to this IA, if i have any queries or difficulties along the way, since my physics teacher isn't on demand as much. Thanks once again, you're awesome! Reply Link to post Share on other sites More sharing options...
Sofia. Posted October 19, 2014 Report Share Posted October 19, 2014 Sure ^^ Reply Link to post Share on other sites More sharing options...
Perfectionist Posted October 21, 2014 Author Report Share Posted October 21, 2014 Do you have a skype? or kik Reply Link to post Share on other sites More sharing options...
Sofia. Posted October 21, 2014 Report Share Posted October 21, 2014 I have kik, but I haven't figured out how to use it yet But you can PM me instead - I'm on this forum way too often so I'll be able to respond quickly Reply Link to post Share on other sites More sharing options...
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