MCQOPTIONS
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MCQOPTIONS
| 1. |
A jet of water (density \[\rho \]) with a cross-sectional area a is striking against a wall at an angle \[\theta \] to the normal and rebounds elastically. If the velocity of water in the jet is v, the normal force acting on the wall is |
| A. | \[2\,\,a{{\upsilon }^{2\,\,}}\,p\,\,\cos \,\theta \] |
| B. | \[a{{\upsilon }^{2\,\,}}\,p\,\,\cos \,\theta \] |
| C. | Hammering of a nail into wood |
| D. | \[a\upsilon \,\,p\,\,\cos \,\theta \] |
| Answer» B. \[a{{\upsilon }^{2\,\,}}\,p\,\,\cos \,\theta \] | |