  Part A.Compute the torque developed by an industrial motor whose output is 175 kW at an angular speed of 5000rev/min.Part B A drum with negligible mass, 0.600 m in diameter, is attached to the motor shaft, and the power output of the motor is used to raise a weight hanging from a rope wrapped around the drum. How heavy a weight can the motor lift at a constant speed?Part C At what constant speed will the weight rise?

Question

Part A.

Compute the torque developed by an industrial motor whose output is 175
kW at an angular speed of 5000rev/min.

Part B
A drum with negligible mass, 0.600 m in diameter, is attached to the motor shaft, and the power output of the motor is used to raise a weight hanging from a rope wrapped around the drum. How heavy a weight can the motor lift at a constant speed?

Part C
At what constant speed will the weight rise?

Step 1

PART A

Given that the power of the motor is 175kW, and the angular speed is 5000rev/min. The expression for the torque of a motor in terms of its power output and the angular speed is given in equation (1) below.

Step 2

Substitute 175kW for P, and 5000rev/min for ω in equation (1) to find the torque.

Step 3

PART B

Torque can be expressed as the product of the force and the moment arm. Here the moment arm is ...

Want to see the full answer?

See Solution

Want to see this answer and more?

Our solutions are written by experts, many with advanced degrees, and available 24/7

See Solution
Tagged in

Physics 