Mo-mo-jo-jo
,
Wednesday, 11th of August 2010 08:15:24 PM
vertically?
a) 25-kg. bag.
b) 50-kg. bag.
c) Both
Mo-mo-jo-jo
the same.
10 points to correct answer!
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Dipsy
,
Thursday, 12th of August 2010 03:38:45 PM
c) Same oh, same oh.
Dipsy
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WE = Fs = Wh = mgh; where work energy is force F times distance s the
Joined: Monday, 17th of May 2010, 22:55:32
force acts over. In this case the force of lifting to height h overcomes
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the weight W = mg of each bag of mass m. g = 9.81 m/sec^2 on average on
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Earth is surface.
Thus, for the m = 25 kg bag, we have WE = mgh = 25*9.81*10 = 2452.5
kg-(m/sec)^2 (aka Newton-m)
For m = 50 kg, we have WE = 50*9.81*5 = 2452.5 N-m.
Gir
,
Saturday, 14th of August 2010 04:07:42 AM
Both examples would be exactly the same work.
Gir
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The work done is mass times distance lifted.
Joined: Wednesday, 19th of May 2010, 18:14:04
This is the same in both cases.
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So the answer is C>
Angelina
,
Sunday, 15th of August 2010 12:44:00 AM
It would the weight not the distance that determines that It
Angelina
stands to reason that carrying something half as heavy as something else
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could be carried further because your muscles wont tire as quick
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