# A level physics hel URGENT!!!

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#1
Basically in circular motion. There is a experiment about centripetal force and you have to swing a bung around in a horizontal circle. The mass is varied but the radius is kept the same. This produces a straight line through the origin on a graph. But, what would happen if the radius was varied but the mass was kept constant.

Can anyone explain this to me using equations and explain the shape of the graph.
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8 months ago
#2
I think you would use the equation F=mω²r, plotting r on the x-axis and F (the centripetal force) on the y-axis.
As the radius increases, the centripetal force increases (F ∝ r). Putting the equation in the y=mx form, you can see that the results would produce a straight line linear graph which passes through the origin and with a gradient= mω²

Hope that helps it's been a while since I've done circular motion but hopefully it's correct (you can always ask your teacher if you're still uncertain/confused!)
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#3
(Original post by vicgb03)
I think you would use the equation F=mω²r, plotting r on the x-axis and F (the centripetal force) on the y-axis.
As the radius increases, the centripetal force increases (F ∝ r). Putting the equation in the y=mx form, you can see that the results would produce a straight line linear graph which passes through the origin and with a gradient= mω²

Hope that helps it's been a while since I've done circular motion but hopefully it's correct (you can always ask your teacher if you're still uncertain/confused!)
Thanks
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