Hi guys. I need some help to solve this problem.

a) A body of mass m kg is attached to a point by string of length

1.25 m. If the mass is rotating in a horizontal circle 0.75 m below the

point of attachment, calculate its angular velocity.

(b) If the mass rotates on a table, calculate the force on the table when

the speed of rotation is 25 rpm and the mass is 6 kg.

I got w=3.60 but don't know is correct or....?