During a winter holiday your family is taking a ride in a horse-drawn sleigh. The horse with the harness pulls the sleigh with a force of 1000 N at an angle of 35° above the horizontal. If the horse and sleigh move at a constant speed, how much work is the horse doing on the sleigh and your family over the 5 km ride? The horse exerts a constant force of 1000 N.
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Explanation:
w=F.D cos35°
=1000×5000×cos35°
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