6. [-/4 Points] DETAILS OSCOLPHYS2016ACC 2.3.P.006. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A helicopter blade spins at exactly 90 revolutions per minute. Its tip is 6.50 m from the center of rotation. (For each answer, enter a number.) (a) Calculate the average speed (in m/s) of the blade tip in the helicopter's frame of reference. m/s (b) What is its average velocity (in m/s) over one revolution? m/s Submit