Constants You wish to buy a motor that will be used to lift a 15-kg bundle of sh
ID: 779114 • Letter: C
Question
Constants You wish to buy a motor that will be used to lift a 15-kg bundle of shingles from the ground to the roof of a house. The shingles are to have a 1.5-m/s2 upward acceleration at the start of the lift. The very light pulley on the motor has a radius of 0.11 m Part A Determine the minimum torque that the motor must be able to provide Express your answer to two significant figures and include the appropriate units Value N m SubmitPrey X Incorrect, One attempt remaining; Try Again Previous Answers Request Answer Provide Feedback Next >Explanation / Answer
Total acceleration = (9.8 + 1.5) = 11.3m/sec^2.
Force required = (ma) = 25 x 11.3 = 282.5N.
torque T= force x distance
= (282.5 x 0.11) = 31.075 N- m.