For a rotating body, the number of revolutions completed in one minute determines its rapidity. The rpm stands for revolution per minute. The direction of angular velocity acts along the axis of rotation of the body. The angular velocity is a vector quantity with both magnitude and direction. The unit of angular velocity is radian per second. Therefore the angular velocity of the wheel would be. Now it moves from point A to point B, making angle theta in t seconds. In doing so, it would move on a circular path. The change in the angle of a rotating body constitutes its angular velocity. Then the angular velocity of the tire would be ДЇrequently Asked Questions (FAQs) Explain angular velocity with an example. Suppose a bicycle tire of 20 inches completes 420 revolutions in 1 minute. The second step is to convert minutes into seconds. The first step is to convert revolutions into radians. The relationship between rpm and angular velocity becomes ДЇor example, a spinning wheel is rotating at the rate of 300 rpm. Therefore the rpm to angular velocity become Therefore, 1 revolution equals to 2ПЂ radians that are ДЇurther, we know that 1 min = 60 seconds. Therefore for the conversion, the revolutions per minute have to be changed to radians per second.ДЎ complete revolution completed by the rotating objects equals 360В°. The standard unit of angular component of velocity is radian per second. We can convert rpm to angular velocity in just simple steps. The rate of the object becomes revolutions completed per minute. RPM (revolutions per minute) also determines how fast the body rotates.1 complete rotation of the object makes up 1 revolution. In a radian per second unit, the angular velocity would equal 2ПЂ radians per second, as 360В° is equal to 2ПЂ radians. A complete circle measures 360В°, so if a particle is completing 1 complete revolution in 1 second, then its angular velocity would be 360 degrees per second. The angular speed or velocity of a rotating body defines how promptly the rotation is done on the circular path. This would be a last option as I would rather know if my CPU fan isn't working.Image Credit: dnetВ based on raster version released under GFDL, Angular velocity, CC BY-SA 3.0

I suppose I could always leave this small fan plugged in to the motherboard for the BIOS to be happy and power the CPU fan off of molex power (along with an additional case fan). Even with no fan, the new heatsink is keeping the processor at 45 C or lower across all 4 cores under medium load. I am able to boot the computer by using a similar sized 4-pin fan plugged into the motherboard while the proper sized fan (actually mounted to the heatsink) is unplugged. Is there another way to change the RPM fan speed settings to avoid the error at boot other than in the BIOS? My BIOS is at a newer level than what the HP site will provide for updates (mine is:Д«IOS Version/Date American Megatrends Inc. I checked my BIOS settings and do NOT have the 'Hardware Monitor' section under the 'Advanced' tab. The fan is larger and I'm sure spins at a lower RPM than the stock fan.

My guess is the motherboard doesn't like the new fan that came with the new heat sink. I used a Cooler Master Gemini II M4 because it was the only increased capacity cooler that would fit in my current case.ДЄfter install, I got the 'Error: CPU fan has failed, computer will now shut down to prevent damage to CPU. My original processor cooling fan stopped working recently and I chose to replace with a better heatsink while I was at it.

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