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  1. G

    As physics p1 MCQS YEARLY ONLY.

    Just divide the area under the graph into two trapeziums and the sum of their areas = the strain energy . * Bear in your mind the units ( cm > m for the extension ).
  2. G

    As physics p1 MCQS YEARLY ONLY.

    L Lets assume that XY is d , then we take the momentum in the clockwise and anti-clockwise directions which must be equal since the rod is in equilibrium . So , Fsin(30) * d = 10 * d/2 , F= 5 / sin(30) = 10 . It's C then . :D
  3. G

    As physics p1 MCQS YEARLY ONLY.

    In Nov 02 , q 32 , I got that the R at +1V would be 20 , but shouldn't the R at -1V be zero it's only a straight line and I think that downward straight line (infinite) is at -1.5V !!??
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