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Mass m of the athletes in the horizontal bar to do chin-up action

tears fish2010-04-10 22:11:56 +0000 #1
mass m of the athletes in the horizontal bar to do chin-up movements to uniform increase from the first hands to shoulder width; hands between the second Shoulder 2 times the distance to compare two players on the horizontal bar down the size of the force, the result is ()
Meng held - Immortal2010-04-10 22:23:45 +0000 #2
The answer is the same, all mg, you see ah , horizontal bar still, people are a uniform linear games, there is no acceleration, it is equilibrium, so no matter how you shake thick stick, as long as CV is the counterweight, so the downward force on the horizontal bar is the same size is mg. Complete answer, I am sure this is the correct answer (my high school physics class, but on behalf of ah), want to help you. If physical problems, please feel free to give me a message ... ...
leran2681288882010-04-10 22:33:41 +0000 #3
twice the force of the rod are the same, only the second time more difficult for you, that is, greater force

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