Recent content by Nnk

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    Magnetism, Credit-Card magnetic strips

    Thanks for pointing that out! I didn't know how to calculate it, so I put the correct answer there for those who could help
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    Magnetism, Credit-Card magnetic strips

    Homework Statement Experiments carried out on the television show Mythbusters determined that a magnetic field of 1000 gauss is needed to corrupt the information on a credit card's magnetic strip. (They also busted the myth that a credit card can be demagnetized by an electric eel or an eelskin...
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    How Does Child Movement Affect Torque and Force Distribution on a Plank?

    Thank you! It is indeed correct. My mistake was using (X)L instead of X, which is why it went wrong
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    How Does Child Movement Affect Torque and Force Distribution on a Plank?

    I did 0.60mg*L -mg(?L) = 0 because that's all I could think of, but obviously the L's cancel.. so I'm not sure how to do it
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    How Does Child Movement Affect Torque and Force Distribution on a Plank?

    Homework Statement A child of mass m is supported on a light plank by his parents, who exert the forces F1 and F2 as indicated. Find the forces required to keep the plank in static equilibrium. Use the right end of the planks as the axis of rotation. ( Answer: F1=(1/4)mg, F2=(3/4)mg )...