Posted by Talia on Friday, November 16, 2012 at 2:41am.
To barely avoid breaking the rope, he needs to apply a force of 150 lb to the rope. There will be a net 20 lb downward force on him and he will accelerate downward at a rate
a = Fnet/m = 20/(170/g)= 0.1176 g
= 3.79 ft/s^2
The time to slide L = 35 ft down the rope will be
t = sqrt(2L/a)= 4.3 seconds
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