Pulley System

Challenge Description

A mechanical engineer is designing a device to lift a load of 500 kg. The device consists of a pulley system with a rope passing over two pulleys, as shown in the diagram below. The load is attached to one end of the rope and the other end of the rope is attached to a motor, which can be used to pull the load up. The engineer wants to use the least amount of power possible to lift the load.

The engineer knows that the coefficient of friction between the pulleys and the rope is 0.1 and the radius of each pulley is 0.5 meters.

Question:

How much power is required to lift the load of 500 kg to a height of 2 meters in 20 seconds?

Challenge terms and conditions

• The challenge is open to all individuals who are interested in applying for a position related to mechanical engineering.
• To participate in the challenge, candidates must submit their answers to the problem via the designated submission platform.
• The challenge will be open for a designated period of time, and submissions will only be accepted during this period.
• The answers will be evaluated based on their accuracy, completeness, and overall understanding of the concepts related to mechanical engineering.
• Candidates who successfully complete the challenge and achieve a high score will be considered for further evaluation and potential employment opportunities with the company.
• The company reserves the right to disqualify any candidate who is found to have cheated or engaged in any unethical behavior during the challenge.
• The company also reserves the right to make any changes to the challenge and its terms and conditions at any time, with or without prior notice.
• By participating in the challenge, candidates agree to have their personal information and answers to the problem shared with the company for evaluation and potential employment purposes.
• The company will keep all personal information submitted by the candidates confidential and will not share it with any third parties without the candidate’s consent.
• The company’s decision on the selection of candidates is final and binding.

By participating in the challenge, candidates agree to all the terms and conditions outlined above.