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manoj jangra Grade: 12
        

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

7 years ago

Answers : (2)

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 W0
since 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 => mXW02Xa

Hence, the answer is (B)
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Rohith Gandhi
7 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
										
6 months ago
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