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| Is it ok? :) |
Well, i figured you can't really see what the scanned in picture wrote so i shall type it out instead. Sorry.
So, assuming that the object weighs 100g and surface 1, 2 and 3 are the least rough, rough and roughest surface respectively, then the experiment would look like the drawings above. As you can see, as the surface gets rougher, it takes a heavier weight to make the object move. So, if we record these information down on a table it would look like the one above.
Ratio=F/m
Mr Lau, is this better?
so we attatch the weight and weight for awhile before it starts moving ? cause we may need to wait for awhile before the block/item starts to move.
ReplyDeleteand should we have a wide variety of weights ? like 1g , 2g , 3g etc cause if we do not , the blocks may not move the item or move it too fast . i dont know if you understand what ive said but it'll be easier to explain real life :x
waiting for mr lau's reply
Just returned from china, and they block Blogger!
ReplyDeleteYour new experimental design is much better. I do have a few questions....
1. What exactly are you measuring with the pulley and weights? Static friction? Sliding friction?
2. Where did you get the bit about "Ratio: weight added/mass of object "? Are you sure?
3. What are your independent and dependent variables?
4. As I have mentioned in my blog (see first blog for this year on LMS LSRP page), your current design will work, but will not score.
You will need to consolidate all of your research together... It's currently in pieces. Good luck!