- #1
indie452
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Hi I am doing some past exam questions for revision and have got stuck on part d) of the attached question.
It is asking, if an impulse is applied to a pendulum, what magnitude of impulse is needed to maintain the pendulums ampiltude.
If it helps the ratio of amplitudes from 2 successive cycles I found to be = exp(-bT/2m), where T=period= 2pi/w
I think w = (velocity immediately after)/(dist. from pivot to impulse) = 10 rad/s
but then i don't know where to go from here.
any help to get started is appreciated
Thanks
It is asking, if an impulse is applied to a pendulum, what magnitude of impulse is needed to maintain the pendulums ampiltude.
If it helps the ratio of amplitudes from 2 successive cycles I found to be = exp(-bT/2m), where T=period= 2pi/w
I think w = (velocity immediately after)/(dist. from pivot to impulse) = 10 rad/s
but then i don't know where to go from here.
any help to get started is appreciated
Thanks