Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:

The common ancestor of all jawed vertebrates on Earth resembled a shark, ... from fish and sharks to birds, reptiles, mammals and humans.
The timeline of human evolution outlines the major events in the development of the human species, Homo sapiens, and the evolution of our ancestors. Chimpanzee-human last common ancestor · Dawn of Humanity (film) · Homininae · Human  It was a member of a group of mammal-like reptiles called the cynodonts.