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Q. A worker pushes a 500-N weight wheelbarrow up a ramp in length and inclined at 20 degrees with the horizontal. What potential energy does the wheelbarrow experience?

Q. A 105-kg water skier floating in a lake is pulled from rest to a speed of 14 m/s in a distance of 25m. What is the net force exerted on the skier, assuming his acceleration is steady?

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