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# Y11 atoms 4 (FUNCAU)

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### Y11 atoms 4 (FUNCAU)

1. 1. Who am I?
2. 2. FUNCAU!
3. 3. Formula Frenzy Atoms and Matter Lesson 3
4. 4. Learning Intention  To learn to recognise and manipulate formulas
5. 5. Using Symbols  When quantities are put into formulas as unknowns we give them a symbol. We use the same symbol to keep track of what we are doing.  Some are easier to remember than others… quantity symbol quantity symbol Distance d Charge Q Time t Current I Speed v Voltage V Displacement s Power P Velocity v acceleration a
6. 6. formulas quantity symbol Distance d Time t v s Speed Displacement Velocity acceleration  In formulas we replace the quantity with the symbol v a d vxt
7. 7. formulas quantity symbol Distance d Time t v s Speed Displacement Velocity acceleration Initial velocity Final velocity v a u v In these formulas a is the subject The symbol Δ (delta) means “change of” d vxt
8. 8. Worked example 1. If a sprinter reaches 12 m/s in 3 seconds what is his acceleration? V=12m/s U=0 m/s t= 3 s a = ? a= 12 – 0 3 a = 4 m/s/s = 4 m/s2 What about me?
9. 9. For Formula Questions always follow FUNCAU F – write formula U – write down the units N – sub in the numbers C – do the calculations A- write answer U – add the units
10. 10. Formulas Lets change the subject What techniques and skills do I need? • To “read” it. These are not just numbers they mean something. • What techniques can we use to “read” it?
11. 11. Formulas Lets change the subject What techniques and skills do I need? • Understand order of operations • BODMAS • BOMDAS • BEDMAS • WHATEVER
12. 12. Formulas Lets change the subject to u
13. 13. A car is travelling at 10m/s and increases to 20m/s in 4 seconds what is it’s acceleration?  If that acceleration continues what will it’s speed be 3 seconds later?  Use E=mcΔT to work out the energy required to raise the temperature of 2kg of water by 10oC. Cwater = 4200 J/kgoC How much water could you boil if you used 10kJ?