where g is the acceleration due to gravity. The projectile will strike the ground when h(t) = 0, which
gives the time to return to the ground, tg = 2(v0/g) sinθ. For θ = 40◦, v0 = 20 m/s, and g = 9.81
m/s2, determine the times when the height is no less than 6m and the speed is simultaneously no
greater than 16 m/s.
This problem can be solved by using the find command to determine the times at which the logical
expression (h >= 6 & (v