A Courier is delivering a 5kg package to an office high in a tall building. a.)

Question

A Courier is delivering a 5kg package to an office high in a tall building.
a.) What upwards force does the courier apply to the package when carrying it horizontally at a constant velocity of 2m/s-1 into the building?
b.) The courier uses the elevator to reach the office. While the elevator (containing the courier who is holding the package) is accelerating upwards at 0.11m/s-2 what upwards force is the courier applying to the package?
c.) When the elevator is traveling upwards at a constant speed of 6ms-1 what upwards force does the courier apply to the package?
d.)In order to stop at the correct floor the elevator accelerates downwards (decelerates) at a rate of 0.20m/s-2. What is the upwards force the courier applies to the package during the deceleration?

(note: please show the work)

Explanation / Answer

a) Fu = m*g b) Fu = m*(g+.11) c) Fu = m*g d) Fu = m*(g - .20)

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