To find the speed of a current. Scientist place a paddle wheel in the stream and observe the rate at which the it rotates. If the paddle wheel has a radius of 3.2 m and rotates 100 rpm how do you find the speed?

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Answer 1 · 2018-07-25T06:20:29

The speed of the current is #=33.5ms^-1#

The radius of the wheel is #r=3.2m#

The rotation is #n=100 " rpm"#

The angular velocity is

#omega=2pin/60=2*pi*100/60=10.47rads^-1#

The speed of the current is

#v=omegar=10.47*3.2=33.5ms^-1#