1.

A body is projected with the velocity u_(1) from the point A as shown in Figure. At the same time another body is projectd vertically upwards with the velocity u_(2) from the point B. What shold be the value of (u_(1))/(u_(2)) for both the bodies to collide.

Answer»

2
`1//2`
`sqrt(3//2)`
1

Solution :The two bodies will the HIGHEST POINT of both cover the same vertical HEIGHT in the same time. So
`(v_(1)^(2)SIN^(2)30^(@))/(2g)=(v_(2)^(2))/(2g)or(v_(2))/(v_(1))=sin30^(@)=(1)/(2)`


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