(a) A small projectile is launched from the ground and lands on
the ground at the same height. Assuming linear air resistance,
compute the time that the projectile travels under the following
conditions: launch speed v0 = 4.00 m/s launch angle θ = 30.0
degrees retarding constant k = 1.00 1/s You may use the
perturbation method (b) Compute the horizontal distance that the
projectile travels.