1.

A spherical balll of mass m is the highest point in the space between two fixed , concentic sphere A and B the smaller the two sphere A has a radius R and the space between the two spheres has a width d . The bell has a disneter very dightly less then d . All surface are frictionless . The bell is a given a gentle push (owards the right in the figure ) The upward vertical is denoted by theta (shown ijn the figure) (a)Express the total normal reaction force exerted by the sphore on the as a finction of angle theta (b) Let N_(A) and N_(B)denote in the magnitubes of the normal reaction force on the bell evered by the sphare A and B repectively Skech the variation of N_(A) andN_(B) as functions of cos thetain the range 0 le theta le piby drawing two separate graph in your answer booktaking cos thetaan the horizental axas.

Answer»

`mg(3 COS theta-2)`
`mg (2 cos theta-3)`
`3MG (2 cos theta-1)`
`2MG (3 cos theta-1)`

Answer :A


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