A pulley system has three pulleys

Force, Work, Power, Energy (10)

A pulley system has three pulleys. A load of 120N is overcome by applying an effort of 50N. Calculate the Mechanical Advantage and Efficiency of this system.

Answer

MA = L/E = 120/50 = 2.4

VR = 3

𝜂 = 𝑀𝐴 / 𝑉𝑅 × 100

  = 2.4 / 3 × 100

  = 80%