A particle is projected with a speed u. If after 2 seconds of projection it is found to be making an angle of `45^@` with the horizontal and `0^@` after 3 sec, then:

A particle is projected from the ground . One second after the projection, the particle is found to be moving at an angle 45^(@) with the horizontal . Speed of the particle becomes minimum two seconds after the projection . If angle of projection is tan^(-1)(n) , then what is the value of n ?

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

A particle is projected with speed 'u' at an angle 60^@ with horizontal, then find the speed when its angle with horizontal changes to 30^@ .

A particle is projected horizontal with a speed u from the top of plane inclined at an angle theta with the horizontal. How far from the point of projection will the particle strike the plane?