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Momentum physics question - Air pucks connected by an open wound spring watch

    • Thread Starter

    Hello there, could someone please explain this in terms of simply energy and momentum?

    Two identical air pucks are connected by an open wound spring which can expand and compress. The pucks move without friction on a horizontal surface. Describe and explain the subsequent motion when the pucks are pulled apart and:

    a) are released together

    b) puck A is held still when puck B is released. Puck A is then released at the instant the spring is reduced to its natural length

    for a) if they are released together, then I guess they both move together but in opposite directions, so momentum is always conserved.

    But what about for b)?

    Thank you

    Check your PMs for Jan 24th.

    You asked the same question then and I gave you a detailed reply.

    Have you lost the messages? I can resend.

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