Exercises 20–23 concern Roger Ramjet and his trajectory when he is shot from a canno...

Exercises 20–23 concern Roger Ramjet and his trajectory when he is shot from a cannon as in Example 6 of this section.

Suppose that Roger is fired from the cannon with an angle of inclination θ of 60^? and an initial speed v₀ of 100 ft/sec. What is the maximum height Roger attains?