2010 Coaches Institute Presentation

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Catapult Science • The circumference of a circle is 2pr • In our case, r is the length of the throwing arm. We will estimate 50 cm. • So if the arm traveled a full circle it would travel (2 X 22/7 X 50)cm or 314.3 cm • So 90 – Θ means our arm moves 314.3(90- Θ)/360 cm. (assume 45) • The arm must travel 39.3 cm.
Catapult Science • The load needs to leave the arm before it reaches 90 or there is no vertical velocity. (the force of the arm drops off) You probably will max out at 70. • We used 45. We will work from here. • So Velocity V is 15.7 / sin45 = 22.2 m/s
Page 1 and 2: NC Science Olympiad Coaches Institu
Page 3 and 4: Storm the Castle • Prior to the T
Page 5 and 6: Rules Event Parameters • Team siz
Page 8 and 9: Construct • Floating Arm Trebuche
Page 11 and 12: Design Construction • Triggering
Page 13 and 14: • Trigger Construction • You ca
Page 15 and 16: Design Construction • The Counter
Page 17 and 18: Projectiles • Racquetballs • Pi
Page 19 and 20: Catapult Science • Math behind th
Page 21 and 22: Catapult Science • If we know how
Page 23 and 24: • So our formula is: • Vv = Uv
Page 25 and 26: Catapult Science
Page 27: • So our formula is: • Vt = Vy
Page 31 and 32: Catapult Science • V 2 = U 2 + 2a
Page 33 and 34: • If the mass of a racquet ball i
Page 35 and 36: • The target will be an open tope
Page 37 and 38: • Launch Score (LS) Scoring • T
Page 39 and 40: • Final Score (FS). Scoring • F
Page 41 and 42: Penalties • Ouch! • A 3 point p
Page 43 and 44: • Measure carefully Construction
Page 45: Instructor • Jim Roberts • robe

2010 Coaches Institute Presentation

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