(b) What is the linear speed of a point on its edge?
Helicopter blades withstand tremendous stresses. In
addition to supporting the weight of a helicopter, they are
spun at rapid rates and experience large centripetal
accelerations, especially at the tip.
(a) Calculate the magnitude of the centripetal acceleration at
the tip of a 4.00 m long helicopter blade that rotates at 300
(b) Compare the linear speed of the tip with the speed of
sound (taken to be 340 m/s).