bell church tower attached wheel radius 08m bell balanced upside down

A bell in a church tower is attached to. A wheel of radius 0.8m. The bell is balanced upside down. The bell-ringer pulls the rope with a force of 50 N A) calculate the moment (turning affect) on the wheel. Give the unit. B) the bell turns. When the rope is traveling at its highest speed, it moves 0.5m in 0.04 seconds. What speed is this? Give the unit.