15. A lift cage has the mass 820 kg and full speed of 30 m/min is achieved after a distance of 1.5 m from the ground. What power requires the drive of the lift a) during uniform upward movement and b) additionally during acceleration at the start? The counterweight has a mass of 250 kg. [a) power 2.796 kW, b) mean power 22.3 W]

15. A lift cage has the mass 820 kg and full speed of 30 m/min is achieved after a distance of 1.5 m from the ground. What power requires the drive of the lift a) during uniform upward movement and b) additionally during acceleration at the start? The counterweight has a mass of 250 kg. [a) power 2.796 kW, b) mean power 22.3 W]

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Description: 15. A lift cage has the mass 820 kg and full speed of 30 m/min is achieved after adistance of 1.5 m from the ground. What power requires the drive of the lifta) during uniform upward movement andb) additionally during acceleration at the start?The c

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter7: Work, Energy, And Energy Resources

Section: Chapter Questions

Problem 38PE: (a) How long will it take an 850-kg car with a useful power output of 40.0 hp (1hp=746W) to reach a...

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