Problem 13.50

A freight elevator, including its load, has a mass of 1 Mg. It is prevented from rotating due to the track and wheels mounted along its sides. The motor M develops a constant tension T = 4.9 kN in its attached cable. Neglect the mass of the pulleys and cables.

Part A

Determine the velocity of the elevator when it has moved upward 4 m starting from rest.

Express your answer to three significant figures and include the appropriate units.

v =

6.25 ms