20. A 2000 N crate rests on a 30 incline. Resolve the force of the crate into components that are parallel and perpendicular to the incline. State the magnitudes of the components. [4 Marks] 21. Determine the value of k such that the vectors (1, 2, 1) and (k, 2k + 1, 8) are perpendicular. [3 Marks] An airplane is flying at an airspeed of 500km/h, on a heading of 0509. A 150-km/h wind is blowing from a bearing of 1200. Determine the ground velocity of the airplane and the direction of flight [4 Marks]