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Engineering Outreach

Engineering Outreach. Presented by Dominic Nolan. The Royal Academy of Engineering. Objectives Delegates will know / be able to / will understand… How The Royal Academy of Engineering supports STEM outreach Receive hands-on experience of an outreach resource Evaluate an outreach activity

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Engineering Outreach

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  1. Engineering Outreach Presented by Dominic Nolan. The Royal Academy of Engineering

  2. Objectives • Delegates will know / be able to / will understand… • How The Royal Academy of Engineering supports STEM outreach • Receive hands-on experience of an outreach resource • Evaluate an outreach activity • Identify areas of development for outreach activity

  3. Engineering Outreach The London Engineering Project (LEP) Strengthen engineering by widening participation in engineering higher education, seeking the active participation of under-represented groups i.e. women, students from certain minority ethnic groups and students from families with no experience of higher education. www.thelep.org.uk The Engaging Engineering Project (EEnP) www.raeng.org.uk/education/eenp

  4. Athlete or Machine?www.raeng.org.uk/athleteormachine

  5. Investigate the big question: athlete or machine? • Practical activities and testing • Mathematics activities • Science activities • Engineer/athlete video • Student led • Independent investigation • Higher level thinking • Scheme of work for STEM day or STEM club

  6. Make a 1:5 bob skeleton sled • 90 minute make • Cheap materials • Basic tools and equipment Make a launcher

  7. Make some timing gates (if you have the time) Launch pressure consistency

  8. Bob Skeleton • 1500m track • 150 m vertical drop • 143 km/h (40 m/s, 89 mph) • Athletes times differ by tenths of seconds • Rules for sled’s dimensions, mass and materials • 33 – 43 kg sled • Amy Williams - Olympic gold 2010 • www.youtube.com

  9. CHALLENGE Make a model of a bob skeleton sled See how far you can launch a Barbie! Present an answer to the question: Athlete or Machine? Which is more important in the sport of bob skeleton?

  10. Make a 1:5 bob skeleton sled • Make the runners by bending the metal rod • Attach runners to pod with cable ties • Make sled’s launch tube using acetate sheet, tape and a plastic nose cone (check that it fits onto the pump’s launch tube) • Fix the launch tube to the pod with double-sided sticky pads

  11. Launch the model bob skeleton sled. • Launch Barbie!

  12. Factors • Weight • The athlete’s shape • The athlete’s position • Aerodynamic lift • Steering • Clothing and equipment • Starting • Corners • Ergonomics (how the body fits a product) • Track incline (the slope down the length of the track) • Friction on the ice • Aerodynamic drag (air resistance) • Tuning the characteristics of the skeleton • Material choice • Sled runners

  13. Mathematics and science activities

  14. Gravity (g) = 9.81 m/s2 Max speed if all PE transferred into KE (diagram not to scale) Mass (m) of athlete and sled = 97kg 1450m Vertical drop of track (h) = 152m Amy Williams max speed Energy transfer Potential Energy (PE) = m x g x h Change in PE for our athlete and sled = 144 639 Joules (J) Kinetic Energy (KE) = ½ x m x v2 0.5 x 97 kg x (40.23 x 40.23) = 78495 J Why isn’t the all of the athlete’s and sled’s potential energy transferred into kinetic energy?

  15. Calculating friction force • Ff =  x m x g • Ff = ………………………… • = Mu, the coefficient of friction (steel on ice = 0.03). m = Mass (kg). g = The acceleration due to the gravity, which is 9.81 m/s2. What is the friction force acting on the runners of a bob skeleton sled and athlete with the combined mass of 97 kg (athlete = 68 kg, sled = 29 kg)? 28.55 N

  16. Calculating drag force • FDRAG = ½ x  x CDx Afx V2 • FDRAG = …………………………. • = 1.2 kg/m3 (density of air) CD = 0.45 (drag coefficient of athlete and sled) • Af = 0.139 m2 (frontal area of athlete and sled) • V = 40 m/s (velocity) Calculate the drag force acting on the athlete and sled as they travel down the track at 40 m/s? 60.01 N

  17. What is the total force resisting the forward movement of the athlete and her sled down the track? FTOTAL = …………………………………… Between which velocities is friction force dominant? ……………………………………………….. Between which velocities is drag force dominant? ……………………………………………….. You can compare the two forces on the graph here. 88.56N 80 70 60 50 Force in Newtons (N) 40 30 20 10 0 25 30 35 40 45 5 10 15 20 Speed in metres/second (m/s)

  18. Prove that it is better to be heavy and narrow when competing in The sport of bob skeleton. ATHLETE 1 Total mass: 97 kg Af: 0.139 m2 ATHLETE 2 Total mass: 100 kg Af: 0.129 m2 Friction 28.55 N Drag 60.01 N Total 88.56 N Friction 29.43 N Drag 55.73 N Total 85.16 N

  19. Athlete or Machine? • Which is more important in the sport of bob skeleton? • Discuss this question with your partner/team • Present your answer to the rest of the group

  20. Discussion • What is good about this activity? • How would you change or improve the activity? • How well would this activity work for your organisation? • Who would benefit and how? • Which members of staff would you need to involve? • Do you have the room? • Would you need to buy extra equipment or resources? • What are the barriers to success and how could they be removed? • What are the strengths of your current outreach activities and how could they be developed?

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