HW20 and 21

Look here for the book's answers to HW20.

For HW21, some students suggested that the fall time from the 6 o'clock position of a moving Ferris wheel will be the same time as just dropping the diver from the 6 o'clock position of a non-moving Ferris wheel.

Is this true?

At the 6 o'clock position, won't the diver move similar to this ball to the right? And this definately has to take more time than just falling straight down from the 6 o'clock position, doesn't it?

Uniform Circular Motion

I found these pictures from the internet that illustrate the initial path (velocity vectors) of objects moving in circular motion.

Identities

Here are some sites for trig identites...



Sine

Cosine

Tangent



This site has a quiz to test your skills. Here is another.