A body is projected with the velocity ` u_1` from the point (A) as shown in Fig. 2. (d). 37. At the same time another body is projected vertically upwards with the velocity ` u_2` from the point (B) .What should be the value of ` u_1//u_1` for both the bodies to collide ?
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Explanation

The two bodies will collide, if they reach at a point acequring the same vertical distance in the same time.
`y=u_(1) sin 60^(@)xxt-(1)/(2)"gt"^(2)=u_(2)t-(1)/(2)"gt"^(2)`
or `u_(1)sqrt(3)/(2)xxt=u_(2)t` or `(u_(1))/(u_(2))=(2)/sqrt(3)`