Equations in a nutshell

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  • Created on: 14-04-13 13:31
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IGCSE Equations in a nutshell
1. Speed =distance/time
2. Acceleration = (final velocity initial velocity)/time
3. Stopping distance = thinking distance + braking distance
4. Resultant force = mass x acceleration
5. Weight = mass × gravitational field strength
6. Moment = force × perpendicular distance from pivot
7. Current =charge flow/time
8. Potential difference/voltage= energy changed /charge
9. Power = energy transferred / time
10. Power = work done/time taken
11. Electrical power = Current x voltage
12. Electrical energy transferred = current x voltage x time
13. Resistance = voltage/current
14. Electrical energy = power x time
15. Frequency = 1/time period
16. Wave speed = frequency x wavelength
17. n=sin i /sin r
18. n=1 /sin c
19. Efficiency = (useful energy output/total energy input ) x 100%
20. Work done= force x distance moved in direction of force
21. Kinetic energy = ½ × m v2
22. Gravitational potential energy = mgh
23. Density = mass / volume
24. Pressure = force/area
25. pressure of a column of a liquid is density x acceleration due to
gravity x height of column
26. P1V1=P2V2
27. Temperature in Kelvin = temperature in Celsius + 273
The equations in bold are given on the exam paper

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