General physics?

Question

Jeff of the Jungle swings on a vine that is r = 6.20 m long . At the bottom of the swing, just before hitting a tree, Jeff's linear speed is 8.70 m/s.
(a) Find Jeff's angular speed at this time= 1.40
(b) What centripetal acceleration does Jeff experience at the bottom of his swing?
Please help with part B

Answer 1

Your angular velocity is correct.

Centripetal acceleration is r w^2 where w is the angular velocity. You know r and w...