Recent content by UCD2

  1. U

    Prove torque equation 2sin^2(theta/2) * cos(theta + beta) = sin (beta)

    :X no one helping me >.< i really having a hard time figuring out the angle. T.T
  2. U

    Prove torque equation 2sin^2(theta/2) * cos(theta + beta) = sin (beta)

    this is what i try so far T.T *writing equation with blood* sum of force along the x-axis of the ball = N(plank)(sin[theta]) - 2w(sin[beta]) = 0 N(plank) = 2w(sin[beta]) / (sin[theta]) take torque of the plank ( draw another separate diagram of the plank{with blood :P} ) axis on the tip...
  3. U

    Prove torque equation 2sin^2(theta/2) * cos(theta + beta) = sin (beta)

    Homework Statement A uniform smooth plank weight W and length 2a is hinged to the bottom horizontal edge of a smooth, fixed plane inclined at angle (beta) to the horizontal. A sphere of radius (1/2)a and weight 2W is placed between the plank and the plane. Assume no friction. Prove that, in...
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