Question

Two circular pucks, each of mass M and radius R, slide toward each other and are about to collide on frictionless ice. The pucks have glue on their edges and when they collide the pucks will stick together.

Before the collision, the rightward-travelling puck has speed 2v and is not rotating; the leftward-travelling puck has speed v and rotates with angular velocity ω, which could be positive or negative.


For the reference point shown in the figure , what is the initial angular momentum of each puck? Answer in terms of M, R, v, and ω

Lupper,i=

unanswered

Llower,i=

unanswered

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Quiz 12, Problem 3 (B)

(1 point possible)
For this part, use whatever reference point you like.

What initial value of the angular velocity ω guarantees that the two-puck system will not be rotating after the collision? Answer in terms of R, M, and v; be sure to indicate the sign of ω .

ω=

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