[" 39.Find the average velocity of a projectile between the "],[" instants it crosses half the maximum height.It is "],[" projected with a speed "u" at an angle "theta" with the "],[" horizontal."]

Find the average velocity of a projectile between the instants it crosses half the maximum height. It is projected with speed u at angle theta with the horizontal.

Find the average velocilty of a projectile between the instants it crosses half the maximum height. It is projected with speed u ast angle theta with the horizontal.

Find the average velocilty of a projectile between the instants it crosses half the maximum height. It is projected with speed u ast angle theta with the horizontal.

For a projectile first with velocity u at an angle theta with the horizontal.

Find the angle of projection of a projectile for which the horizontal range and the maximum height are equal.

Find the angle of projection of a projectile for which the horizontal range and maximum height are equal.

Find the angle of projection of a projectile for which the horizontal range and maximum height are equal.

Find the angle of projection of a projectile for which the horizontal range and maximum height are equal.

A stone projected with a velocity u at an angle (theta )with the horizontal reaches maximum heights H_(1) . When it is projected with velocity u at an angle (pi/2-theta) with the horizontal, it reaches maximum height H_(2) . The relations between the horizontal range R of the projectile, H_(1) and H_(2) , is