- #1
mcintyre_ie
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Hey, got an interesting little question here that i need some help (and would really appreciate any you can give) on:
1)The initial acceleration
2)The velocity of A just before it picks up the mass at C
3)Using the principle of conservation of momentum, or otherwise, the velocity of A after picking up the mass at C
4)The distance of A from C at the first position of instantaneous rest.[/QUOTE]
Ok, so the following picture has my workings so far.
http://community.webshots.com/s/image6/8/99/80/97489980FcVsxZ_ph.jpg
I took "T" as being the tention in the piece of string. What I am getting stuck on is what happens when the particle A picks up the mass at C - it starts to fall back down, right, since its .1kg heavier than the counter mass, or does it have enough acceleration to keep going for awhile, then drop down? I am not sure how i should go about investigating this.
I think I've gotten parts one and two right (image), part 3, I am not so sure how to do, same goes for part 4. I was thinking that part 5 would just be that the particle has fallen back to the starting position, and that that would be the first period of instantaneous rest, or maybe its on its upward journey when it stops for an instant before falling back down? I am just confused
Please help! Its very much appreciated
Find:Two particles, A and B, of mass 0.4kg and 0.5kg respectively, are connected by a light inextensible string passing over a smooth pulley. When A has risen for 1 second, it passes a point C and picks up a mass of 0.2kg.
1)The initial acceleration
2)The velocity of A just before it picks up the mass at C
3)Using the principle of conservation of momentum, or otherwise, the velocity of A after picking up the mass at C
4)The distance of A from C at the first position of instantaneous rest.[/QUOTE]
Ok, so the following picture has my workings so far.
http://community.webshots.com/s/image6/8/99/80/97489980FcVsxZ_ph.jpg
I took "T" as being the tention in the piece of string. What I am getting stuck on is what happens when the particle A picks up the mass at C - it starts to fall back down, right, since its .1kg heavier than the counter mass, or does it have enough acceleration to keep going for awhile, then drop down? I am not sure how i should go about investigating this.
I think I've gotten parts one and two right (image), part 3, I am not so sure how to do, same goes for part 4. I was thinking that part 5 would just be that the particle has fallen back to the starting position, and that that would be the first period of instantaneous rest, or maybe its on its upward journey when it stops for an instant before falling back down? I am just confused
Please help! Its very much appreciated
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