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Dr. Mason’s Patented Quiz #2 Review Presentation Accept no substitutes Void where prohibited Limit one per family.

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Presentation on theme: "Dr. Mason’s Patented Quiz #2 Review Presentation Accept no substitutes Void where prohibited Limit one per family."— Presentation transcript:

1 Dr. Mason’s Patented Quiz #2 Review Presentation Accept no substitutes Void where prohibited Limit one per family

2 “Everyone fights, nobody quits”

3 Fill in the blanks V 0 = V i = Difference between V 0 and V i = V 0X = V 0Y = Pythagorean Theorem = T =

4 Trig Stuff A = 13 b = 9 c =

5 Trig Stuff A = 13 b = c = Θ = 40 0

6 Más Trig y x V 0 = 25 m/s Draw V 0X and V 0Y to scale on graph V 0X = V 0Y = Θ = 35 0

7 Más Trig y x V 0 = 25 m/s Draw V 0X and V 0Y to scale on graph V 0X = V 0Y = Θ = 140 0

8 Vectors V 0X = - 60 m/s V 0Y = 35 m/s Θ = V 0 =

9 Vectors V 0X = - 40 m/s V 0Y = - 25 m/s Θ = V 0 =

10 Vector Problems A plane flies due north at a speed of 400 km/hr The wind blows towards the east at a speed of 100 km/ hr. Draw a diagram depicting this. Calculate the magnitude and direction of V f.

11 Vector Problems As previously, a plane flies at 400 km/hr with a wind blowing east at 100 km/hr. At what heading does the plane need to fly in order to end up flying due north? Draw a diagram.

12 Projectile motion concepts Motion in horizontal and vertical directions are: Acceleration always points: Why: The vertical speed of a projectile at the apex of its trajectory:

13 Projectile motion concepts again The point in the trajectory where the projectile moving the slowest: Why: Describe the horizontal and vertical components of velocity at these 5 places:

14 Final velocity, vector style A plane flying horizontally at a speed of 200 m/s drops a care package from a height of 1000m. When the care package hits the ground, these are the magnitude and direction (measured from the positive X-axis) of its final velocity.

15 Figuring out V 0X and V 0Y A projectile launches from the ground and lands 120m downrange in 3.4 seconds After how long did it reach its apex? What is V 0X ? What is V 0Y ?

16 Figuring out V 0X and V 0Y A projectile launches from the ground and lands 120m downrange in 3.4 seconds How high did the projectile go? What was the launch angle? What was the original launch speed V 0 ?

17 Equations for 2-D motion V 0X (in terms of V 0 and θ) = V 0Y (in terms of V 0 and θ) = Free fall equation (no V 0Y ): Y- Y 0 (in terms of V 0Y, g, t) =

18 The infamous boy throwing rock off the cliff problem A boy throws a rock horizontally off a 130m cliff. The rock’s V 0 = 15 m/s. How long after the rock is thrown does it hit the ground? How far did it travel horizontally?

19 The infamous punter hang time problem A football punter kicks the ball with a speed of V0 = 35 m/s at an angle of 38 0 from the horizontal. How long does it stay in the air? How long to reach its apex?

20 The infamous ‘how far does the punter kick the ball’ problem…with a twist A football punter kicks the ball with a speed of V0 = 35 m/s at an angle of 38 0 from the horizontal. How far does the punter kick the ball? How high does it go?

21 The range equation The range equation: A cannon shoots a human at an angle of 40 0 and a V 0 of 50 m/s. How far downrange does he land? Pretend air resistance is now turned on. How would that affect the range calculated in the previous problem?


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