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A dog sits 1.50 m from the center of a merrygo-round with an angular speed of 1.78 rad/s.
If the magnitude of the force that maintains the dog's circular motion is 42.7 N, what is the dog's mass?
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John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positive direction, what are John and Betty's speeds?
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