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A police jeep is chasing with, velocity of `45 km//h` a thief in another jeep moving with velocity `153 km//h`. Police fires a bullet with muzzle velocity of `180 m//s`. The velocity it will strike the car of the thief is.A. `150 ms^(-1)`B. `27 ms^(-1)`C. `450 ms^(-1)`D. `250 ms^(-1)` |
Answer» Correct Answer - A Let `upsilon_(PG)` = velocity of police w.r.t. ground `upsilon_(TG)` =velocity of thief w.r.t. ground `upsilon_(TP)` = velocity of thief w.r.t. police `=upsilon_(TG)-upsilon_(PG)` `=((153-45)/(18))xx5=30 ms^(-1)` `upsilon_(BC)` = velocity of bullet w.r.t. car `=180-30=150 ms^(-1)` |
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