Alight string is wrapped around a solid cylindrical spool of radius 0.565 m and mass 1.76 kg. a 5.04 kg mass is hung from the string, causing the spool to rotate and the string to unwind. assume that the system starts from rest and no slippage takes place between the string and the spool. use conservation of energy to determine the angular speed of the spool after the mass has dropped 4.19 m. hint: use the relation v=ïr, and use conservation of energy.

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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