A certain wind turbine's blade is 65m long (so the diameter of the of windmill is 130m ). It makes one complete revolution every 2.1s. a) What is the linear speed v of the tip of the turbine blade? (Look out, little bird!) b) Find the centripetal acceleration of the tip of the blade, both in m/s2 and how many 'g's that means it experiences. (For reference, people blackout at a sustained 4-6 g force if they don't have help from a g suit.)