- #1
Hailcanadien
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Homework Statement
A window washer pulls herself upward using the bucket-pulley apparatus shown in Fig. 4-48. The mass of the person plus the bucket is 61 kg.
(a) How hard must she pull downward to raise herself slowly at constant speed?
298.9 N
(b) If she increases this force by 12%, what will her acceleration be?
? m/s2
Homework Equations
F=ma
UkFn=ffr
The Attempt at a Solution
I tried...
298.9 x 1.12=334.8
and put it in the equation...
334.8N=(30.5kg)(a)
and got 10.976 m/s2...
which wasn't right...
I used 30.5 instead of 61 because a pulley makes the weight half...