Asked by Pink
                1) Determine the extension of the trampoline when a 200 kg person stands on the trampoline. (k=12000)
2) If on the first push, the trampoline went 8.0 cm below its position in part 1, find the average force exerted by his leg muscles?
For the first question i was able to get 0.33m (i think that's the answer, i used mgx=1/2kx^2)
but i have no idea how to do the second question...
            
        2) If on the first push, the trampoline went 8.0 cm below its position in part 1, find the average force exerted by his leg muscles?
For the first question i was able to get 0.33m (i think that's the answer, i used mgx=1/2kx^2)
but i have no idea how to do the second question...
Answers
                    Answered by
            bobpursley
            
    1.   wrong equation.
Hookes law: force=mg=kx
2. force*distance=1/2 kx^2
Now really, think on that, it gives you half the force on part 1. But because force is linear, from zero to max, it makes sense that the average force then is half the max force, kx.
Avg force=1/2 kx
    
Hookes law: force=mg=kx
2. force*distance=1/2 kx^2
Now really, think on that, it gives you half the force on part 1. But because force is linear, from zero to max, it makes sense that the average force then is half the max force, kx.
Avg force=1/2 kx
                    Answered by
            Pink
            
    Okay, so I understand how to do the first question now, but i'm still not clear on how you did the second one...
 
    
                    Answered by
            bobpursley
            
    work going into trampolene= avg force*distance= avgF*x
that equals the stored enrgy 1/2 kx^2
avgF=1/2 kx
    
that equals the stored enrgy 1/2 kx^2
avgF=1/2 kx
                                                    There are no AI answers yet. The ability to request AI answers is coming soon!
                                            
                Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.