## Question:

The pulley arrangement shown is designed for hoisting materials. If BC remains fixed while the plunger P is pushed downward with a speed of 4 ft/s , determine the speed of the load at A.

## Step-by-step

5 $s_{B}$+$\left(s_{B}-s_{A}\right)$=l
6 $s_{B}$$s_{A}$=l
6 $v_{B}$$v_{A}$=0
6(4)=$v_{A}$
$v_{A}$=24 ft/s