Question

A belt 12.25 meters long passes around a 3.5 cm diameter pulley while belt makes three complete revolutions in a minute. How many radian does the wheel turn in 5 seconds?

Answer 1

In `1` min or `60` sec there occurs three complete revolutions i.e `3xx2pi` radian rotation of the pulley.

So in `5` sec the turning will be `(6pi)/60xx5=pi/2`radian