Read the paragraph.Students enrolled in Physics 101 were asked to assemble wooden cars to demonstrate the principles of friction. The cars began as uniform kits, each containing a four-inch block of wood, four wheels, and two metal rods. Students carved, assembled, painted, and embellished their creations. In the end, there was an impressive line-up of mini racers with sleek, sanded bodies. They represented every color of the rainbow, with racing stripes and lightning bolts adorning many.