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/s2) of the centripetal acceleration at the tip of a 3.40 m long helicopter blade that rotates at 295 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 =

A fairground ride spins its occupants inside a flying saucer-shaped container. If the horizontal circular path the riders follow has a 4.33 m radius, if the riders is subjected to a centripetal acceleration 3.9 times that due to gravity, what is the spinning speed in unit of revolutions per minute? Use g = 9.8 m/s2.

A child is holding a string with a ball tied at the end. The childspins around in a circle causing the ball to travel in uniformcircular motion. While doing this, the 1.3 m long string makesa 48.8◦angle below horizontal. What is the tangential speedof the ball? Solution provided is incorrect. Answer should be v=2.7m/s

A circular disk of radius 0.200 m rotates at a constant angular speed of 1.50 rev/s. What is the centripetal acceleration (in m/s^ 2 ) of point on the edge of the disk?

A ball on a string goes in a circle with a constant speed of 19.0m/s. If the radius of the circle is 1.4m, what is the magnitude of the centripetal acceleration?

I am completely stumped on this one.

a marshmallow is placed 3.9cm away from the center of a rotating microwave plate for 0.6 minutes. if the plate rotates at 6.5 rpm, what is the tangential acceleration in m/s/s?

When a fighter pilot makes a very quick turn, he experiences a centripetal acceleration. When this acceleration is greater than about 4 × g the pilot will usually lose consciousness (“black out”). Consider a pilot flying at a speed of 950 m/s who wants to make a very sharp turn. What is the minimum radius of curvature that he can take without blacking out?