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. (For each answer, enter a number.) (a) Calculate the magnitude (in m/s?) of the centripetal acceleration at the tip of a 3.00 m long helicopter blade that rotates at 240 rev/min. m/s? (b) Compare the linear speed of the tip with the speed of sound (taken to be 340 m/s). Vtip/V sound

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. (For each answer, enter a number.) (a) Calculate the magnitude (in m/s?) of the centripetal acceleration at the tip of a 3.00 m long helicopter blade that rotates at 240 rev/min. m/s? (b) Compare the linear speed of the tip with the speed of sound (taken to be 340 m/s). Vtip/V sound

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter4: Two-and-three Dimensional Motion

Section: Chapter Questions

Problem 41PQ

See similar textbooks

Similar questions

An office door is given a sharp push and swings open against a pneumatic device that slows the door down and then reverses its motion. At the moment the door is open the widest, (a) does the doorknob have a centripetal acceleration? (b) Does it have a tangential acceleration?
A door in a hospital has a pneumatic closer that pulls the door shut such that the doorknob moves with constant speed over most of its path. In this part of its motion, (a) does the doorknob experience a centripetal acceleration? (b) Does it experience a tangential acceleration?
A pilot performing a horizontal turnwill lose consciousness if she experiences a centripetal acceleration greater than 7.00 times the acceleration of gravity. Whatis the minimum radius turn she can make without losing consciousness if her plane is flying with a constant speed of 245 m>s?
A new car is tested on a 280-m-diameter track. If the car speeds up at a steady 1.5 m/s^2 , how long after starting is the magnitude of its centripetal acceleration equal to the tangential acceleration?
A body of weight 20 N, mass 2 kg is moving in vertical circular motion with the help of a string of radius 1 m and with a velocity of 2 m/s. What is the tension in the string at the lowest point?
A highway curve of radius 360 m is designed for traffic moving at a speed of 115 km/hr. What is the correct banking angle (in deg) of the road assuming that the local acceleration due to gravity is -9.80 m/s2?
The power to electric motor rotating at 600 rpm is cut off. If the magnitude deceleration of the centrifuge is 2.3 rad/s2 how many revolutions does it make before coming to rest?
A bicycle, starting from rest, accelerates at 2.07m/s2 on a circular track with a 195 m in diameter. What is the elapsed time, in seconds, at which the centripetal acceleration of the bicycle has the same magnitude as its tangential acceleration?
Consider a circular-motion problem in which tension not only must provide the proper radial acceleration but also must balance gravity. As we shall see, it can do both. A tetherball is attached to a swivel in the ceiling by a light cord of length L, as measured from the ceiling to the center of the tetherball. When the ball is hit by a paddle, it swings in a horizontal circle with constant speed vv, and the cord makes a constant angle β with the vertical direction. The ball goes through one revolution in time T. Assuming that T, mass mm, and length L of the rope are known, derive algebraic expressions for the tension FT in the cord and the angle β. a)What is the period T of the ball’s motion if L=2.0m and the cord makes an angle of β=40∘with the vertical?
How fast (in rpm) must a centrifuge rotate if a particle 9 cm from the axis of rotation must experience an acceleration of 10,000 m / s2?
To avoid accident in the road, the minimum velocity with which a car driver must traverse a curve of radius 150m and coefficient of friction 0.6 to avoid skidding is?
What is the minimum radius at which an airplane flying at 134.9 m/s can make a U-turn if its centripetal acceleration is NOT to exceed 2.1 m/s??