Question

Helicopter blades withstand tremendous stress. 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 rev/min.
B) Compare the linear speed of the tip with the speed of sound (taken to be 340 m/s).