1. The problem statement, all variables and given/known data How much force is needed to swing a 4kg mass in a 3m radius horizontal circle so that each cycle takes exactly 2 seconds. Answer is 118N but the problem is how do I get to that... 2. Relevant equations V=2Pir/T F=mv^2/r 3. The attempt at a solution I tried using F=mv^/r one but I got nowhere close my teacher just solves problems without explaining at all and I have no clue how to solve it except find numbers. Thank you for your time.