Multiple Choice Question 16.9.

Part A

The scaffold S is raised hydraulically by moving the roller at A towards the pin at B. If A is approaching B with a speed of 1.5 ft/s, determine the speed at which the platform is rising as a function of θ. Each link is pin-connected at its midpoint and end points and has a length of 4 ft.

 

vS=1.500 cotθ ft/s