Question

when a projectile is thrown with same initial velocity at different angles we obtain different ranges.is the vertical velocity same for all?

Answer 1

The vertical velocity of a projectile of initial velocity $\displaystyle\bf{u}$ and angle of projection $\displaystyle\sf{\theta}$ is given by,

$\displaystyle\longrightarrow\sf{u_y=u\sin\theta-gt}$

Hence it depends on the angle of projection, and therefore, the vertical velocity is not the same for projectiles thrown with different angles of projection though with same initial speed.