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```        A particle of mass m rotates witha  uniform angular speed w , It is viewed from a frame rotationg about the Z axis with  a uniform angular speed wo . the centrifugal force on the particle is
A. mw2a        B.mwo2a        c.m(w+wo/2)2 a                     d.mwwoa ```
8 years ago

Rohith Gandhi
24 Points
```										Dear Manoj,we consider a centrifugal force on the object if we look at it from non-inertial frame of reference.a frame is non inertial if the frame has an accelaration.now, we are viewing mass, m from a frame which is rotating about z axis with uniform angular speed W0since the frame is in circular motion, it should have a centripetal accelaration towards its centre, i.e. frame has an accelaration which means frame is non inertial.now magnitude of accelaration of the frame is W02Xa, (where a is the radius of the circle in which frame is rotating.)so, now the centrifugal force on mass m = accelaration of the frame X mass of the body => mXW02XaHence, the answer is (B)Please feel free to post as many doubts on our discussion forum as you can. If you find any questionDifficult to understand - post it here and we will get you the answer and detailed solution very quickly. Weare all IITians and here to help you in your IIT JEE preparation.All the best Manoj !!!Regards,Askiitians ExpertsRohith Gandhi
```
8 years ago
pavitra nandini
23 Points
```										A roller of mass 300kg and radius 50cm lying ona horizontal floor is resting against a step of height 20cm.The minimum horizontal force to be applied on the roller passing through its centre to turn the roller to the step
```
one year ago
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