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The oscillation of rod OA about O is defined by the relation (? = 4/p)(sin pt), where ? and t are expressed in radians and seconds, respectively. Collar B slides along the rod so that its distance from O is r = 10 / (t + 6), where r and t are expressed in mm and seconds, respectively. When t = 1 s, determine
(a) The velocity of the collar,
(b) The total acceleration of the collar,
(c) The acceleration of the collar relative to the rod.
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The water molecule H2O, with a permanent dipole moment of magnitude of 6.2x10^-30 Cm, What force does the ion exert on the water molecule
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