A house painter uses the chair and pulley arrangement of the figure to lift himself up the side of a house. The painter's mass is 74.5 kg and the chair's mass is 10.3 kg. With what force must he pull down on the rope in order to accelerate upward at 0.21 m/s^2.
what is the magnitude of the force on the painter by the chair?
newtons 2nd law
The Attempt at a Solution
I found the first part. The force he must pull down with is 424 N and that is correct.
I cannot find the question that is in bold about "The magnitude of the force on the painter by the chair"
This is what i tried but im not sure if it is correct.
w = 74.5*(9.8+.21) = 746 N
does that look right?