The 539N was the Force with F=ma and a = g. I think I forgot to write that.
The -428N was the Force with F=ma and a = 7.8m/s2.
My inclination was to subtract the forces to get the force required by the bungee cord to slow the decent to the 7.8m/s2
Homework Statement
A person weighing 55kg jumps off of a bridge with a bungee cord attached. The problem seeks to find the bungee cords Force vector when the acceleration is 7.8m/s2 in the downward direction.
m = 55kg
a1 = g = 9.8m/s2
To find:
F1 when a2 = 7.8m/s2 downward.
I've...