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souvik das Grade: 12
        

231_21405_untitled.jpg 


 PLEASE GIVE PROPER EXPLANATION.

7 years ago

Answers : (3)

Shashank Shekhar
33 Points
										

This question will be faulty until you give some relation between radius of curvatures of pt. A,B and C.


Now,if radius of curvatures at all 3 pts are assumed to be equal,then:


For A,


      N+(mv^2/r)=mg;           because centrifugal for will act along the radial vector joining A and centre of curvature and in opposite           N=mg-(mv^2/r)             direction,so will get added to normal reaction force(N) which is along the same direction.


For B,


      N=mg+(mv^2/r);           because N will act in up direction while centrifugal force and weight will act in forward direction.


For C,


      Same as A.


Therefore,N(A)=N(C)<N(B).


 


NOTE:This question has been solved assuming the plane of motion to be vertical.


          If the plane of motion is horizontal,N(A)=N(B)=N(C)=mg.


 


 


 


 

7 years ago
Rishabh Dabral
32 Points
										

IS THE ANSWER N2>N1>N3?

7 years ago
priyank sharma
37 Points
										

in this question if you consider your reference frame on the car and then apply the concept of centrifugal force.


 


 


now,at point A,


mg=n+centrifugal


 


at B,


mg+centrifugal=n


 


so the normal at b is definately more than at a.for c we have to note that the centrifugal depends on radius and hence more the radius less the centrifugal.

7 years ago
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