Chapter 20.4, Problem 40P

At the instant θ = 60°, the construction lift is rotating about the z axis with an angular velocity of ω₁ = 0.5 rad/s and an angular acceleration of $\stackrel{\dot{}}{\omega }$₁ = 0.25 rad/s² while the telescopic Doom AB rotates about the pin at A with an angular velocity of ω₂ = 0.25 rad/s and angular acceleration of ${\stackrel{\dot{}}{\omega }}_2$ = 0.1 rad/s². Simultaneously, the boom is extending with a velocity of 1.5 ft/s, and it has an acceleration of 0.5 ft/s², both measured relative to the frame. Determine the velocity and acceleration of point B located at the end of the boom at this instant.

Probs. 20-39/40