Question: An elevator is used to move hay from a trailer into the loft of a barn. The vertical lift distance is 2 0 feet and

An elevator is used to move hay from a trailer into the loft of a barn. The vertical lift distance is 20 feet and each bales weighs 45 lbs. The rate at which the bales are placed into the loft is 8 per minute. If the elevator has a mechanical efficiency of 17%(ratio of power useful in raising hay to power put into elevator), what is the required power input to the elevator?

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