1.

Two particles `A` and `B` are projected in same vertical plane as shown in figure.Their initial positions `(t=0)`, initial spped and angle of projections are indicated in the diagram.If initial angle of projection `theta_(B)=37^(@)`, what should be initial speed of projection of particle `B`, so that it hits particle `A`.`U_(A)=60m//s` A. `80 m//s`B. `75 m//s`C. `40 m//s`D. `45 m//s`

Answer» Correct Answer - A
`V_(rel)` in along line joining the particles `60 sin 53`
`= V_(B) sin 37 V_(B) = 80 m//s`


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