Posted by **johnny** on Thursday, December 11, 2008 at 4:54pm.

An object is hung from a spring balance attached to the ceiling of an elevator cab. The balance reads 60 N when the elevator is standing still.

(a) What is the reading when the elevator is moving upward with a constant speed of 9.6 m/s?

N

(b) What is the reading when the elevator is moving upward with a speed of 9.6 m/s while decelerating at a rate of 1.9 m/s2?

N

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