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# Force and motion.

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A boy drags his 60-N sled at constant speed up a 15° hill. He does so by pulling with a 25-N force on a rope attached to the sled. If the rope is inclined at 35° to the horizontal,

(a) what is the coefficient of kinetic friction between the sled and the snow?

(b) At the top of the hill, he jumps on the sled and slides down the hill. What is his acceleration down the slope?

##### Solution Summary

The coefficient of friction and acceleration on an inclined plane is calculated.

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