Your roommate is working on his bicycle and has the bike upside down. He spins the 68.0cm -diameter wheel, and you notice that a pebble stuck in the tread goes by three times every second.

Question

Your roommate is working on his bicycle and has the bike upside down. He spins the 68.0cm -diameter wheel, and you notice that a pebble stuck in the tread goes by three times every second.
What is the pebble's speed?
What is the pebble's acceleration?

bobpursley · Answer

speed=distance/time=PI*68cm/.3333sec acceleration= speed^2/radius of course, radius is still half diameter.

augie · Answer

2-5