The velocity ratio and efficiency of a system of pulleys are 6 and 80% respectively….

Physics WAEC 1996

The velocity ratio and efficiency of a system of pulleys are 6 and 80% respectively. How much effort is required to lift a load of mass 120kg with this system? (g=10ms-2)

  • 25N
  • 90N
  • 96N
  • 250N checkmark
  • 960N

The correct answer is: D

Explanation

Efficiency =
M.A/V.R
x 100%

=
80/100
=
120 x 10/E

E = 250N
Previous Question Next Question

Leave A Comment