I need some help with the following question:
A smooth spherical object (the first object) is projected horizontally from a point of vertical height H = 26.38 metres above horizontal ground with a launch speed (initial velocity) of u = 21.05m/s
A second identical object is projected from ground level with launch speed (initial velocity) v and at an angle A above the horizontal.
Calculate the value of this launch angle A in radians, if the second object is to have the same horizontal range and the same time of flight as the first object. Take acceleration at gravity to be $g = 9.81m/s^2$.