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| 1. |
A ball `A` is thrown up vertically with a speed `u` and at the same instant another ball `B` is released from a height `h`. At time `t`, the speed `A` relative to `B` isA. uB. `u-2gt`C. `sqrt(u^(2)-2gh)`D. `u-gt` |
| Answer» `a_("rel")=0 U_("rel")-cosnt=U` | |