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QUESTION

You arrive at an abandoned building. There is a note on the front door instructing you to take the elevator to the 6th floor.

You arrive at an abandoned building. There is a note on the front door instructing you to take the elevator to the 6th floor. The elevator starts from rest at the first floor of the building and comes to a complete stop at the 6th floor. It can accelerate at 6 ft/s2 and then decelerate at 2 ft/s2. Determine the shortest time is takes to reach the 6th floor, which is 60 ft above the ground. Draw the v‐t and 

s‐t graphs for the motion of the elevator. 

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