Recent content by psychicgerm

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    Change in GPE of the moon as the radius increases. Getting extreme answers

    Okay, i get it, it does make sense actually. I used wolfram alpha to calculate the tiny change and when multiplied by GMm, it comes to 10^18J. Whoa, that is something huge, didn't expect that. Fd gives the same answer. Bleh, losing those 2 marks :(
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    Change in GPE of the moon as the radius increases. Getting extreme answers

    Thank you very much for the replies. @Janus : I predicted so, thanks for the info though :) @collinsmark : I thought my method was more accurate. Although, is getting an answer very close to 0 J practical? And the method my friend used is clearly incorrect isn't it? I mean, does using...
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    Change in GPE of the moon as the radius increases. Getting extreme answers

    Okay, first of all, sorry for not posting here, I unknowingly posted this q in the wrong section and got an infraction. Sorry againHomework Statement Question : Calculate the change in gravitational potential energy of the moon, when the radius of it's orbit increases by 4cm. Radius ...
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    How Do You Calculate Forces on a Plank with Unevenly Placed Weights?

    Moment -- A weight on a plank Homework Statement A uniform plank of weight 120 N rests on two stools as shown in the link provided below. A weight of 80N is placed on the plank, midway between the stools. Calculate the force acting on the stool at A and B. The answer is 80N and 120 N...