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A man stands on a scale in an elevator that has an upward acceleration a. The...

A man stands on a scale in an elevator that has an upward acceleration a. The scale reads 972 N. When he picks up a 19.4 kg box, the scale reads 1211 N.

1) Find:The mass of the man.

mman

2)The weight of the man.

Wman =

3)The acceleration a.

a =

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