A man who does bungee jump jumps by the platform. The mass of the man is 60Kg . There is 45m from the platform to the water. Without stretching the rope is 25m long. The spring constant(k)=160Nm-1. What is the extention of the robe?
Attempt to solve
The man has a gravitational force of 60*9.8N and so F=60*9.8N
But there is a mistake in my attempt. I can't find where it is. Can you help me for find the mistake?