Why must the bungee cord stretch relatively easily to avoid injuring the jumper? refer to linear momentum and impulse, and also work and kinetic energy. the jumper has a momentum (or energy) budget, but it is the high acceleration (force) that does damage. the question is tantamount to asking “how can we minimize the acceleration of the jumper? ”

Here we can say that if amount of acceleration is more than it will cause more damage

so here in order to decrease the acceleration we can say

so it is ratio of change in velocity and time interval

where if time interval is to be increased in order to decrease the amount of acceleration

So the time to stop after jumping from large height should be large so that acceleration will be very small.

In order to have large time we can say that the chord must have to stretch more amount so that it will take long time to stop and hence we will get less acceleration and this will cause least damage

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer