I found this question to be answered twice on this site, both by hallsofivy. However, I still don't quite get it. Please help. A window washer pulls herself upward using the bucket pulley appartus. a. how hard must she pull downward to raise herself slowly at constant speed? b. if she increase this force by 15% what will her acceleration be? The mass of the person plus the bucket is 65 kg. It was posted that I need to use the formula F=ma, i understand this part and I understand that there is no acceleration because there is constant speed. But how do I use what I know? The bucket and HEr is equal to 65. I multiplied this by 9.8 to find the weight which equals 637 kg. But this isn't the correct force. The answer should be 320, or as I found about half of the answer I obtained. What am I doing wrong?