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Example: Squirrel Feeder Fun

Example: Squirrel Feeder Fun. This squirrel jumps from a relatively low height, but let’s look at a daredevil squirrel that lands on this feeder after dropping 1 meter Some parameters Mass of squirrel: 600 g Mass of corn: 200 g Length of arm: 50 cm

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Example: Squirrel Feeder Fun

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  1. Example: Squirrel Feeder Fun • This squirrel jumps from a relatively low height, but let’s look at a daredevil squirrel that lands on this feeder after dropping 1 meter • Some parameters • Mass of squirrel: 600 g • Mass of corn: 200 g • Length of arm: 50 cm • Neglecting the mass of the arms, find the angular velocity of the feeder immediately after the squirrel lands on the cob

  2. Squirrel Velocity • This is a conservation of angular momentum problem! • The word “immediately” is most important in making this argument • If we treat the squirrel and feeder as a single system, we can neglect the impulsive force between the two. • Find the velocity of the squirrel at impact – conservation of energy!

  3. Conserving Angular Momentum • Since the squirrel feeder is initially at rest, all of the initial angular momentum is due to the moving squirrel • After the squirrel impacts the feeder it stays attached • How would this problem change if we wanted the angular velocity 1 second after impact? Is angular momentum still conserved?

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