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A window washer pulls herself upward using the bucket-pulley apparatus The mass of the person plus the bucket is 70 kg.

A) How hard must she pull downward to raise herself slowly at constant speed?................N

(b) If she increases this force by 9%, what will her acceleration be?

..................m/s2

I figured out part A) by taking 70 kg and multiplying it by 1/2 A which equals 4.9m/s2 and so the answer is 343 Newtons. But for part b i am confused as to how to use the the 9% and how to work it out..

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