Calculating Force Needed to Lift 79kg Mass at Const. Speed

[daltomagne]

A woman raises herself in a bucket. How hard must she pull downward to raise herself slowly at constant speed? The mass of the person plus the bucket is 79 kg.

m=79kg
g=9.8m/s^2 (downward)

i know \SigmaF=ma so i end up with 774.2 N. I'm a little lost as where to go now.

 

[fizzynoob]

Sum the forces in the y direction, if speed is constant that acceleration is zero

Forces in y =Fp- Fg = 0

Solve for fp

 

[Olly4]

You actually already solved it. For something to move at a constant speed, the net force has to be 0. So she just has to pull hard enough to overcome the gravitational force. Which you already calculated.

 

[Doc Al]

You need to understand how she is raising herself. A simple rope and pulley arrangement? A diagram would be helpful.