Pulley- Force and Acceleration
A window washer pulls herself upward using the bucket-pulley apparatus shown in Fig. 4-40. The mass of the person plus the bucket is 68 kg.
Figure 4-40.
(a) How hard must she pull downward to raise herself slowly at constant speed? (N)
(b) If she increases this force by 10 percent, what will her acceleration be (upward)?
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(a) How hard must she pull downward to raise herself slowly at constant speed? (N)
constant velocity means upward forces equal downward forces
Total force acting down = m*g (total weight)
Total forces acting up=
F {the tension in the rope pulling on the bucket} + F ...
Solution Summary
The solution calculates the force required by the washer to raise herself slowly at constant speed and the acceleration if this force is increased.