1. The problem statement, all variables and given/known data At takeoff, a commercial jet has a speed of 60.0 m/s. Its tires have a diameter of 0.850 m. (a) At how many rpm are the tires rotating? (b) What is the centripetal acceleration at the edge of the tire? (c) With what force must a determined 10-15 kg bacterium cling to the rim? (d) What is the ratio of this force to the bacterium’s weight? 2. Relevant equations angular velocity = v/r centripetal acceleration = v^2/r 3. The attempt at a solution I divided 60.0 m/s by .425 m to get (a). To get (b) I squared 60.0 m/s and divided it by .425 m. I am really stuck on (c). I am thinking the force it needs to cling to the rim is equal to the centripetal force. So, does that mean I just multiple it's mass by the centripetal acceleration? Any help would be appreciated.