It’s your birthday, and to celebrate you’re going to make your first bungee jump. you stand on a bridge 100 m above a raging river and attach a 30-m-long bungee cord to your harness. a bungee cord, for practical purposes, is just a long spring, and this cord has a spring constant of 40 n/m. assume that your mass is 80 kg. after a long hesitation, you dive off the bridge. how far are you above the water when the cord reaches its maximum elongation?

Explanation:

Given that:

Height of jump,

length of elastic cord,

spring constant of the cord,

mass of the body that jumps,

Force on the bungee elastic cord:

Now this force F will be responsible for the elongation in the elastic cord, so:

............................(1)

where :

k = spring constant

x = extension in the elastic cord

using eq. (1)

So the cord stretches 19.6 meters more beyond its original length of 30 meters.

Hence, the remaining distance from the river surface at the bottom is:

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this