A block of mass m is placed on a circular track and then it is given a velocity upsilon vertically downwards at position A on track. If block moves on track with constant speed, then

A block of mass m is placed on a circular track and then it is given a

1.	A block of mass m is placed on a circular track and then it is given a velocity upsilon vertically downwards at position A on track. If block moves on track with constant speed, then
Answer» Coefficient of friction between block and circular track as function of angle `theta` is `MU=(SINTHETA)/(cottheta+v^(2)/(Rg))` Coefficient of friction between block and circular track as function of angle `theta` is `mu=(sintheta)/(costheta+v^(2)/(Rg))` INSTANTANEOUS power due to friction is `-mgv sin theta` Work done from A to C by friction on block will be `-mgR` Answer :B::C::D