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| 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 A. hit the rod between `O` and `A` (except mid point)B. hit the rod at its mid pointC. hit the rod at `A`D. not hit the rod at all |
| Answer» Hint : First find the point where collision occurs using equation of trajectory. Then use conservation of angular momentum. After collision energy conservation is valid. | |