1.

A particle of mass 1kg is projected at an angle of theta=pi//4 from horizontal with a muzzle velocity of 20 m//s. A long slender rod of mass 5kg and length 30 m is suspended vertically from a point at the same horizontal leves as that of point of projection and at a distance of 60m from the projection point. The rod can rotate freely. If collision occurs, it is perfectly plastic. (g=10m//s^(2)) If projectile is fired horizontally, it will

Answer»

hit the rod between `O` and `A` (EXCEPT mid point)
hit the rod at its mid point
hit the rod at `A`
not hit the rod at all

Solution :Hint : FIRST find the point where collision occurs USING equation of trajectory. Then use conservation of angular momentum. After collision ENERGY conservation is VALID.


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