A bungie jumper falls for 1.3s before the bungee cord begins to stretch. Until the jumper has bounced back up to this level, the bungee causes the jumper to have an average acceleration upward of 4 m/s^2.
a. How fast is the jumper going when the bungee cord begins to stretch?
b.How far below the diving platform is the jumper at that moment?
c. How long after the bungee cord begins to stretch does the jumper reach the low point of the drop?
d. How far below the diving platform is the jumper at the instant the speed is zero?
The Attempt at a Solution
I have gotten A which is 12.74 m/s^2, im having trouble getting b though and I havent even started c or d. This is my first Physics class ever and its in college so im having a bit of trouble getting started here...
The teacher has posted the answers so we can check ourselves and the answer to B is 8.28m which I can get with 1/2*a*t but the appears to be the formula for velocity, and what exactly is the 12.74 m/s^2 and how do I get that to 12.74 m/s?