A projectile is fired at t = 0 with an initial velocity of vi at an angle of ? with respect to the horizontal towards the vertical side of a building that is a distance d away as shown in the figure.
(a) Determine an equation for the time at which the projectile strikes the building. (Use any variable or symbol stated above as necessary.)
(b) Determine an equation for the height h above the ground at which the projectile strikes the building.