



 
Hi Kyra, I can help get you started. Let's start with the pulley of radius 8 cm. What is its circumference? A point on the circumference of the pulley moves at 24 cm/sec. How long does this point take to make one revolution of the pulley? One revolution of the pulley is $2 \pi$ radians so the point is moving at how many radians per second? Write back if you need more assistance,  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 