Question

what will be the values of MA and VR of a block and tackle system of 4 pulleys. Given that its efficiency is 80%​

Answer 1

Answer:

(i) Diagram of a system indicating the direction of its load and effort is given.

(ii) Efficiency =

V.R

M.A

×100

75=

5

M.A

×100

M.A.=

100

75×5

=3.75

M.A=

Effort

Load

3.75=

150kgf

Load

Load =3.75×150

=562.5kgf