Recent content by Cocagola

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    Problem Involving Ring's gravitational force and velocity of distant partice

    Thanks!
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    Problem Involving Ring's gravitational force and velocity of distant partice

    oh shoot! I forgot that the mass doubles as well as the radius. Yes, I was overcomplicating things by using kinematics rather than using conservation of energy... But the thing that was messing me up was not doubling the mass as well as the radius.
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    Problem Involving Ring's gravitational force and velocity of distant partice

    Homework Statement A uniform circular ring of radius R is fixed in place. A particle is placed on the axis of the ring at a distance much greater than R and allowed to fall towards the ring under the influence of the ring’s gravity. The particle achieves a maximum speed v. The ring is...
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    Problem involving two Ice Skaters' Positions

    Thank you so much! Ratios make everything easier. I was getting bogged down by too many unknowns. I am glad I joined PF.
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    Problem involving two Ice Skaters' Positions

    Homework Statement Two skaters on a frictionless pond push apart from one another. One skater has mass M much greater than the mass m of the second skater. After some time the two skaters are a distance d apart. How far has the lighter moved from original position. The answer is somehow...