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# Physics in the city2

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• We would give them show me boardsForces- stationary: weight, upthrustforces moving: drag, kinetic energy, weight, upthrust
• Need a picture
• What happens if you work in the opposite direction to your partner.
• Cartoon animation type thing to rep
• Fuel equivalent to chemical energy of people power.
• Mention efficiency
• ### Physics in the city2

1. 1. Sharmin, Maria, Fozia and Zanab
2. 2. Where are we going?Acker’s Adventure(Sparkbrook).What are we doing?CanoeingWhy are we going?To have fun learningphysics!!!
3. 3.  Consent form, Medical/ emergency contact Suitable clothes: Waterproof clothing, footwear with grip, no jewellery, no valuables Risk assessment- life jackets Need a trained first aider (School Staff). Staff: Student = approx. 1:5
4. 4. Key word Basic DefinitionForce Pushing or pulling action, resulting in movement: F= maMass Measured in grams/ kgWeight Vertical force of an object, Measured in All related to Newtons W= mg the motion,Acceleration The rate at which velocity increases a=V/t (m/s2) speed and potential of theEnergy The ability to make things happen. Measured in Joules. canoe.Speed How fast an object is travelling s= d/tVelocity Speed + directionNewton’s Laws 1st, 2nd, 3rdof motion
5. 5. How will having more Name the weight forces effect the boat?Where is the energy How can we coming work out from? What keeps the velocity? the boat floating?
6. 6.  Difference between stationary and movingStationary In Motion
7. 7.  Newton (b.1643) (father prosperous farmer). Difficult man, prone to depression, often involved in bitter arguments with other scientists. Lived to his eighties (no spectacles)! Experimented on himself: -Pressure experiments by applying needle to eyes (effect on colour vision of the curvature of the orbit). -Light and its properties. Experimented with way we see (relationship between light, colour and optics). Almost blind looking for long periods directly into sun while observing coloured rings. (Dark room)? Apple story: Reports suggest apple did not fall on his head (Stukeley in his Memoirs1726). Concluded: Force which caused apple to fall to Earth also kept moon in orbit around Earth and planets in orbit around sun (basic laws of motion used to date).
8. 8.  Upthrust- When canoe is in water, a volume of water is displaced so upthrust is equal to volume of water (demo). Newton’s 1st law: If no resultant force acting on object, will remain at rest. If it’s moving, will continue to move with a constant velocity in straight line. Newton’s 3rd law : To every action there is an opposite and equal reaction- 2 objects involved- canoe, water. Upthrust from the water and the weight are equal and opposite forces. There’s no resultant vertical force so canoe does not sink.
9. 9.  What will happen if there are more people in the canoe?Increase in mass, therefore increase inweight.If an unbalanced force acts on the object itwill either accelerate or decelerate.
10. 10. Another example of an unbalanced force… Canoe will move in 3rd direction- spin!
11. 11.  Energy transfers- Potential Chemical Kinetic http://www.youtube.com/watch?v=4Ss2QX4p_Ts Energy transfers (1) More people rowing (faster) (2) Moments (3)
12. 12.  Observe different speeds by changing the mass in the boat. What does mass affect? Force sizes/ speed
13. 13. How does increasing the massMass (g) Time (s) 14 affect the time taken? 120 4 1010 5 8 Time (s) 620 7 4 230 12 0 0 10 20 Mass (g) 30 40 Distance travelled: 79cm As you can see, the putt boat with less mass in it, has travelled the furthest and fastest. As for the heaviest mass, the mass in the boat, decreased its speed.
14. 14.  Speed = distance/time Distance (m) Time (s) Speed (m/s) 0.79 4 0.198 0.79 5 0.158 0.79 7 0.113 0.79 12 0.066 0.25 How does increasing the mass affect the speed of the boat? 0.2 Speed (m/s) 0.15 0.1 0.05 0 0 10 20 30 40 Mass (g)