An orange might roll off your cafeteria tray when you stop suddenly because of a. the balanced forces acting on the orange. b. the centripetal force acting on the orange. c. the friction forces acting on the orange. d. the orange’s inertia.

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above