Use your trigonometry skills to mathematically describe the vertical position of the gray dot on the driving wheel over time.
How can you use this to describe the vertical position of a small piece of the string?

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.