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Question: A boy drags a 100 N sled up a 20° slope at a constant velocity. If the coefficient of friction between the sled and the hill is 0.20, what force must he exert at an angle of 35° with respect to the hill?
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Of the charge Q initially on a tiny sphere, a portion q is to be transferred to a second, For what value of q/Q>0.5 will the electrostatic force between the two parts have 1/2 of the maximum possible value
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Two astronauts of equal mass 76 kg are holding on to opposite ends of a straight rope in space. The length of the rope between them is 18meters. What is the new angular velocity of the two astronauts
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