1.

A particle is projected with `40ms^(-1)` at anlge `53^(@)` above horizontal. It speed when it is moving at `37^(@)` with horizontal isA. `20ms^(-1)`B. `30ms^(-1)`C. `10ms^(-1)`D. `15ms^(-1)`

Answer» `a_(x)=0`
`rArr 40 cos 53^(@)=V cos 37^(@)`
`40xx(3)/(5)=Vxx(4)/(5)`
`V=30^(-1)`


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