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You are pulling a sled in which your little sister is seated at an 15 degree...

You are pulling a sled in which your little sister is seated at an 15 degree angle. If the mass of the sled and the girl is 42 kg, and the coefficient of kinetic friction between the sled and surface is 0.15, with what tension do you need to pull in order for the sled to move with constant velocity?
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