Two projectiles are thrown simultaneously in the same plane from the same point. If their velocities are `v_(1)` and `v_(2)` at angles `theta_(1)` and `theta_(2)` respectively from the horizontal, then ansewer the following questions
If `v_(1)costheta_(1) = v_(2)cos theta_(2)`, then choose the incrorrect statement

Options

A. the time of flight of both the particles will be same
B. the maximum height attained by the particles will be same
C. the trajectory of one with respect to another will be a horizontal straight line
D. none of these

Answer

B

Explanation

`y = xtan theta-(gx^(2))/(2x^(2)cos^(2)theta)`
`75 = x tan53^(@) - (gx^(2))/(2xx50^(2)cos^(2)53^(@))`
`75 = x (4)/(3) - (x^(2))/(2xx2500xx9)`
`75 = (4x)/(3)-(x^(2))/(180)`
solving
`x_(1) =150 m " "x_(2) = 90m`
`Deltax= 60m`