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The floor to ceiling height of an elevator is 4.5?. The elevator starts from the ground...

The floor to ceiling height of an elevator is 4.5?.

The elevator starts from the ground at rest and accelerates upward at 6?/?2. At ?=1?, a lamp on the elevator ceiling starts to fall (due to high ?forces).

How long will it take the lamp to hit the floor? Solve this problem in two ways:

a) From the perspective of a fixed X-Yframe(the ground frame).

b) From the perspective of a frame moving with the elevator (the relative frame).

Engineering   Mechanical-Engineering   
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