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Grade: 11
        a fan is running at 3000 rpm. It is switched off.It comes to rest by uniformly decreasing its angular speed in 10 seconds.The total number of revolution in this period.
one year ago

Answers : (2)

Arun
15941 Points
							
Dear Aadesh
 
thanks= 500 - 250 = 250 rotations.2= 50* 10 + 0.5 (-5) 10\ThetaSo,2t\alphat+ 0.5= w\ThetaNow,2= – 5 rotations / s\alphat,\alpha+oSo, w = 0 = wtime = 10 seconds= 300 rpm = 3000 /60 rotations per second = 50 rpsoGiven , wHi,
 
Regards
Arun (askIITians forum expert)
one year ago
Arun
15941 Points
							
thanks= 250 rotations.2= 50* 10 + 0.5 (-5) 10\ThetaSo,2t\alphat+ 0.5= w\ThetaNow,2= – 5 rotations / s\alphat,\alpha+oSo, w = 0 = wtime = 10 seconds= 3000 rpm = 50 rotations per secondoGiven , wHi,
one year ago
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