Post on 18-Jan-2016
transcript
Velocity Vectors
&
Projectile Motion
Wind 20 km/h East
Wind 20 km/h West
Wind 20 km/h South
Plane 100 km/h East
Plane 100 km/h East
Plane 100 km/h East
VELOCITY VECTORS
Plane 120 km/h East
Plane 80 km/h East
Plane 102 km/h SE
Question 1
• When an airplane flies directly into the wind, is the speed of the airplane across the ground more, less, or unaffected?
• Answer: Less speed. In fact, if the airplane's speed matches wind speed, the airplane would stay in one place (like a bird often does when it faces the wind) .
Question 2
• When an airplane flies directly with the wind, so the wind comes from behind, is the speed of the airplane across the ground more, less, or unaffected?
• Answer: It is more.
Question 3
• When an airplane flies in a cross wind, so its nose is pointing at right angles to the wind, is the speed of the airplane across the ground more, less, or unaffected?
• Answer: It is more! How much more and in what direction is found by vectors!
Projectile Motion
2gt
21dFree Fall
timedistance Speed => distance = Speed ∙ time
Projectile Motion
Projectile Motion
Vy = g ∙ t t = 2 ∙ Vy / g R = Vx ∙ t
Projectile Motion
Projections at Different Angles
Projectile Motion