Part a of the drawing shows a bucket of water suspended from the pulley of a well; the tension in the rope is 76.5 N. Part b shows the same bucket of water being pulled up from the well at a constant velocity. What is the tension in the rope in part b?
http://img264.imageshack.us/my.php?image=p446ca2.gif
It's due at midnight!
2007-05-30 15:27:10 · 3 answers · asked by Kat 1 in Science & Mathematics ➔ Physics
Thanks so much for those who actually gave me an answer. That's what my friend said and that's what I thought after reading my book backwards and forwards.
And first person.... I've been working on this question for a while now. I'm sorry I'm bad at physics and can't read between the lines of it.
2007-05-30 15:38:31 · update #1
Ok, my friend tried the same velocity.. and it didn't work as the answer. Any other ideas anyone?
2007-05-30 15:40:29 · update #2
For those that didn't know and would just like to know just in case, you just multiple the force given by two because when the bucket is like the first picture... it is F = (mg)/2. So then you just multiply the Force by 2 since the 2nd picture is F = mg.
2007-05-30 16:25:11 · update #3
constant velocity shouldn't add any tension to the rope. When velocity is constant a = 0, so F = 0 because F = ma.
I vote for 76.5 N
2007-05-30 15:33:29 · answer #1 · answered by dave r 2 · 1⤊ 0⤋
Next time we won't wait so long to do our work, will we?
2007-05-30 15:31:13 · answer #2 · answered by Lady Geologist 7 · 0⤊ 3⤋
Why would it change if you are pulling it up? 76.5N
2007-05-30 15:34:07 · answer #3 · answered by savage708 3 · 0⤊ 1⤋