A body is thrown from the surface of the Earth at an angle a
15
to the horizontal with the initial velocity v0. Assuming the air drag
to be negligible, find:
(a) the time of motion;
(b) the maximum height of ascent and the horizontal range; at
what value of the angle a they will be equal to each other;
(c) the equation of trajectory y (x), where y and x are displacements
of the body along the vertical and the horizontal respectively;
(d) the curvature radii of trajectory at its initial point and at its
peak.