Question
C htps://www.webassign.net/web/Student/Assignment-Responses/submit?dep-10975035 a ia A helicopter blade spins at 115 revolutions per minute. its tip is 6 50 m from the center of rotation (a) Calculate the average speed of the blade tip in the helicopter's frame of reference b) What is its average veloeity over one revclution? mus Adddional Hawrials t take dhe to drift 420 km farther The North American and European continents are moving apart at a rate of about 3 cmy. At is rate how long wl apart than they are at present? worlds nonatop long-distance speed record for trains Its run from On May 26, 1534, a streamined, stairless steel desel train called the Zephyr set the 13 hours, 4 min te 58 seconds, and was- Deriver to chcago took 13 fhours, 4 minudes, 58 seconds, and was witrnessed by more than a mition people aiong the route. The lecal distance truvesied Denver la Chicago look
Explanation / Answer
3) angular velocity w = 115 rev/m = 12 rad/s
a) V= Rw = 6.5 x 12 =78.2 m/s
b) average velocity over one revolution is zero
4) total distance = 420km
speed = 3cm/y = 3 x 10-5km /y
time = distance/speed = 420/3x10-5= 1.4 x107 years
