Ricky, mass 95 kg, and cathy, who is lighter, are enjoying lake mendota at dusk in a 20 kg canoe that is 3.0 m long. when the canoe is at rest in placid water, they exchange seats, which are at the ends of the canoe. ricky notices the canoe moved 30 cm relative to a submerged rock during the exchange and uses that to calculate cathy’s mass. what is cathy’s mass?

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

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