Question

Q1. In a block and tackle system, the maximum number of pulleys in the lower block should be equal to the number of pulleys in the upper block and the minimum number of pulleys in the lower block should be one less than the number of pulleys in the upper block. Why?​

Answer 1

Answer:

(i) The labelled diagram of the system of block and tackle system of pulleys is shown indicating clearly the points of application and direction of load and effort.

(ii) Given : Velocity ratio (V.R.)=4, Load =4T, Effort =T

Mechanical advantage (M.A.)=

Effort

Load

=

T

4T

=4