Explanation :
Static friction is the frictional force between two objects that are at rest. While sliding friction is the frictional force between two objects in contact and are sliding w.r.t each other.
Static friction is usually greater than sliding friction because in static friction the contact forces is more and the interlocking between objects is tight as compared to sliding friction.
Answer:
if he is chasing his tail faster with each circle, then that would be acceleration, If not then no
The answer is D light rays shine on an object which then reflects back to our retina
