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A person pulls a toboggan for a distance of 50.0 m along the snow with a rope directed 25.0° above the snow. The tension in the rope is 78.0 N.
(a) How much work is done on the toboggan by the tension force?
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(b) How much work is done if the same tension is directed parallel to the snow?
(a) What is the light intensity on a wall 3.0 m away from the lightbulb. (b) Where did the 96 W go. (c) A krypton laser produces a cylindrical red laser beam 3.0 mm in diameter with 4.0 W of power.
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An airplane flies eastward and accelerates uniformly. At one position along its path it has a velocity of 26.7 m/s. Find the airplane\'s acceleration
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