The fire truck is moving forward at a speed of 35 mi/hr and is decelerating at the rate of 10 ft/sec². Simultaneously, the ladder is being raised and extended. At the instant considered the angle θ is 30° and is increasing at the constant rate of 10 deg /sec. Also at this instant the extension b of the ladder is 5 ft, with b˙ = 2 ft/sec and b¨ = −1 ft/sec². For this instant determine the acceleration of the end A of the ladder 

(a) With respect to the truck 

(b) With respect to the ground.

Transcribed Image Text:

20 B