An effort of 10 N is applied at the free end of the string passing on a single movable pulley system with a load attached to it.  The weight of the movable pulley is 3 N.  The frictional forces are negligible.

(a) Calculate the mass of the load being raised.

(b) On a diagram of the pulley system with strings, mark the directions of the forces, effort E, tension in the strings T and the load L.

(c) Calculate the tension T in anyone segment of the string.

(d) Also calculate V.R, M.A and efficiency.  Take g = 10 ms-2

Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM

Expert Answer:

 

Given : E = 10 N, W = 3 N, mass of load = ?, T = ? V.R, M.A and

E = T, L + W = 2T = 2E;  L = 2E - W = 20 - 3 = 17 N

(a) Mass of load = 17 / 10 = 1.7 kg

(b) 

(c)T = E = 10 N

 

(d)

Answered by  | 4th Jun, 2014, 03:23: PM