Problem on circular motion - solved

the question:

An object of mass 4 kg moves round a circle of radius 6 m with a constant speed of 12 m/s.


Read the question first :

Calculate
1.the angular velocity
Answer: angular velocity= speed/readius
= 12/6
= 2 rad/s
ok this is done with the formula : angular velocity= speed/readius
the next question is
2.the force towards the center (using a=v2/r)

Answer: force = m a
= mx v2/r ok
= 4x 122/6
=96N