Recent content by pintsize131

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    Electric Potential and Kinetic Energy of a point charge

    A uniform electric field has a magnitude 2.40 kV/m and points in the +x direction. (a) What is the electric potential difference between x = 0.00 m plane and the x = 3.90 m plane? (b) A point particle that has a charge of +3.40 µC is released from rest at the origin. What is the change in the...
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    Uniform plank problem: Center of gravity, equilibrium, and torque

    thanks! That helped! I got the question right. :)
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    Uniform plank problem: Center of gravity, equilibrium, and torque

    I get stuck almost immediately. The torque for the weight of the board: t=Fd t=(Weight force?) (1.1 m) I don't know how to find the weight for just that section of the board. Am I even supposed to find that?
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    Uniform plank problem: Center of gravity, equilibrium, and torque

    Happy new year to you too! I honestly have no idea what I am doing. My teacher assigned this homework over break, and told us to teach ourselves, so I need a crash course in torque. I have no idea what that means. Literally, I'm clueless.
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    Uniform plank problem: Center of gravity, equilibrium, and torque

    Homework Statement A uniform plank of length 4.7 m and weight 207 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 454 N walk on the overhanging part of the plank before it just begins to...