A box slides across the floor for 1.5 m, and slows to a stop. The friction between the box and the floor is 10 N.
How much work did the friction do on the box? (And is the work positive or negative?)
motion
1.5 m

What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.