• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Window Washer Problem (Forces)

  • Thread starter zm87
  • Start date
4
0
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.
 

HallsofIvy

Science Advisor
Homework Helper
41,709
876
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".
 

Related Threads for: Window Washer Problem (Forces)

  • Posted
Replies
7
Views
14K
  • Posted
Replies
3
Views
7K
  • Posted
Replies
7
Views
4K
  • Posted
Replies
1
Views
40K
Replies
1
Views
1K
Replies
18
Views
2K
Replies
1
Views
3K
  • Posted
Replies
4
Views
1K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top