(a) The shortest time would be the time it takes the propeller to make 1/3 of a full turn, so that the three blades are lined up on the same way. Call that time T.
13.2 rev/s * T = 1/3 rev
T = 1/(13.2*3)= 0.0253 s
(b) The next shortest time will be twice that, 0.0506 s.
A stroboscope is a light that flashes on and off at a constant rate. It can be used to illuminate a rotating object, and if the flashing rate is adjusted properly, the object can be made to appear stationary.
(a) What is the shortest time between flashes of light that will make a three-bladed propeller appear stationary when it is rotating with an angular speed of 13.2 rev/s?
s
(b) What is the next shortest time?
s
I was able ti figure out the next shortest time, but I keep getting the first part of the question wrong
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