Two Solid Spheres of Equal Size and Mass Are Joined

question 192

Multiple Choice

Two solid spheres of equal size and mass are joined by a spring-loaded, extendible rod. The whole unit is spinning like a baton (end-over-end) 5 times per second. Suddenly the rod stretches, pushing the spheres farther apart. What change takes place as a result of the stretching?

• A) The angular momentum of the spheres and rod decreases.
• B) The angular momentum of the spheres and rod increases.
• C) The rate of spin of the spheres and rod decreases.
• D) The rate of spin of the spheres and rod increases.

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