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 . Each link is pin-connected at its midpoint and end points and has a length of 4 ft.

The scaffold S is raised hydraulically by moving the roller at A towa

1.	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 . Each link is pin-connected at its midpoint and end points and has a length of 4 ft.
A.	vS = 2.67 sin2 ft/s
B.	vS = 1.500 cot ft/s
C.	vS = 1.500 tan ft/s
D.	vS = 2.67 cos ft/s
Answer» C. vS = 1.500 tan ft/s

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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 . Each link is pin-connected at its midpoint and end points and has a length of 4 ft.

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