# Window Washer Problem (Forces)

#### zm87

A window washer pulls herself upward using a bucket-pulley apparatus. How hard must she pull downward to raise herself slowly at constant speed? If she increases this force by 10% what will her acceleration be? The mass of the person and bucket is 65 kg.

Need some help, gracias.

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#### HallsofIvy

Homework Helper
Force= mass * accleration.

If the person is moving at constant speed (no acceleration) that means there is no net force- she is pulling just enough to equal her weight. You are given that her mass is 65 kg. What is her weight?

Now, increase that pull by 10%. Subtract off her weight again to get net force and use "force equals mass times acceleration".

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