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The crate, having a weight of 50 lb, is hoisted by the pulley system and motor M. If the
Chapter 14, Problem R14-5(choose chapter or problem)
The crate, having a weight of 50 lb, is hoisted by the pulley system and motor M. If the crate starts from rest and, by constant acceleration, attains a speed of 12 ft/s after rising 10 ft, determine the power that must be supplied to the motor at the instant s = 10 ft. The motor has an efficiency \(\varepsilon = 0.74\).
Questions & Answers
QUESTION:
The crate, having a weight of 50 lb, is hoisted by the pulley system and motor M. If the crate starts from rest and, by constant acceleration, attains a speed of 12 ft/s after rising 10 ft, determine the power that must be supplied to the motor at the instant s = 10 ft. The motor has an efficiency \(\varepsilon = 0.74\).
ANSWER:
Step 1 of 5
Mass of the crate, .
Speed,
Distance arise,
The motor has an efficiency e = 0.74.