In a science lab, a sphere rolls on a horizontal flat surface until it eventually comes to rest, but not as a result of a frictional force. Which of the following is the best explanation of why the sphere comes to rest?
W) The spherical shape and/or flat surface must not be ideal and the sphere will stop where a defect makes that location a minimum potential-energy position
X) Some other force, like fluid friction, must be acting on the sphere
Y) Angular momentum between the rolling sphere and the spinning Earth must be conserved
Z) The force of gravity must not be constant even though the surface is flat
✔️Answer:W) THE SPHERICAL SHAPE AND/OR FLAT SURFACE MUST NOT BE IDEAL AND THE SPHERE WILL STOP WHERE A DEFECT MAKES THAT LOCATION A MINIMUM POTENTIAL ENERGY POSITION
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