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IGCSE PHYSICS

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@d!_†oX!©:
A bungee jumper of mass 60kg jumps from a bridge tied to an elastic rope which becomes taut after he falls 10m. Consider the jumper when he has fallen another 10m and is traveling at 15m/s.
Work out how much energy is stored in the rope. Take g= 10m/s2 and ignore air resistance.

now i know this is a pretty easy questioon bt i cant get the answer how to do it....the answer is 5250 J....
i did it by subtracting the k.e from the p.e
but why is it so???

guys help plss

~~~~shreyapril~~~~:
the rope will store PE right??
if not it will have strain energy!!

so if PE then it will be mgh = 60*10*10 = 6000!!

but thatss not the ans so!!
starin energy will be MA = 60*10 = 600!!

but this is also not the ans!!

@d!_†oX!©:
dude u took the pe wrong cuz it will be 10*20*60
read the ques carefully shrey!!!

~~~~shreyapril~~~~:

--- Quote from: @d!_†oX!© on November 06, 2009, 01:01:54 pm ---dude u took the pe wrong cuz it will be 10*20*60
read the ques carefully shrey!!!

--- End quote ---
]
due i have my eyes in place!!!
it says - 10 meters !!
how can you take 20????

@d!_†oX!©:
Consider the jumper when he has fallen another 10m

can u read this????so 10 + 10 = 20 m


now dont come up with some other excuse to cover up plssss....

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