One second after the projection, a stone moves at an angle of ` 45@` with the horzontal. Two seconds from the start, it is travelling horizontally. Find the angle of projection with the horizontal. (g=10 ms^(-2))`.

One second after the projection, a stone moves at an angle of 45^@ with the horizontal. Two seconds from the start, it is travelling horizontally. Find the angle of projection with the horizontal. (g=10 ms^(-2)) .

After one second the velocity of a projectile makes an angle of 45^(@) with the horizontal. After another one more second its is travelling horizontally. The magnitude of its initial velocity and angle of projectile are (g=10m//s^(2))

A particle is projected in the X-Y plane. 2sec after projection the velocity of the aprticle makes an angle 45%(@) with the X- axis. 4sec after projection, it moves horizontally. Find the velocity of projection (use g = 10 ms^(-2)) .