A wheel with radius 41.5 cm rotates 5.13 times every second. Find the period of this motion.
What is the tangential speed of a wad of chewing gum stick to the rim of the wheel?

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.