1 / 16

Importance of Formulas in Mathematics

Learn why formulas are crucial in mathematics and how to use them effectively. Explore formulas for area of a disc, speed, distance, time, and the famous equation E=mc2. Understand the process of changing the subject in formulas.

cherlyb
Download Presentation

Importance of Formulas in Mathematics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Why have formulas? Area of disc Speed, Distance, Time E = mc2 Changing the subject

  2. Why have formulas? • Formulas are designed to make maths easy. • When presented with a new formula, learn what each letter stands for. Once this is known, the formula can be used. • The important thing about formulas is to use them without worrying about where the formulas come from. This is what they are produced for.

  3. Area of disc = r2 r r

  4. Distance Time Speed = 10 5 D S T = Walk 10 metres (m) across the room in 5 seconds. = 2 m/sec

  5. E = mc2 E = energy measured in joules (J) m = mass measured in kilogrammes (kg) c = speed of light measured in metres per second (m/s) Light moves at about 300,000 km/sec!

  6. Changing the subject of a formula –– E = m c2 (m) Divide both sides by c2

  7. Changing the subject of a formula –– E = m c 2 (c) Divide both sides by m Take the square root of both sides

  8. Changing the subject of a formula e 2 + 2f – ––––– (e) ( ) a + d = u Multiply both sides by u Take 2f from both sides Take the square root of both sides

  9. s = ut + at2 1 2 – Changing the subject of a formula (a) Take ut from both sides

  10. s – ut = at2 1 2 – Changing the subject of a formula (a) Multiply both sides by 2

  11. Changing the subject of a formula (a) 2(s – ut)= at2 Divide both sides by t2

  12. 2(s – ut) ––––––– = a t2 Changing the subject of a formula (a) Multiply out top line

  13. 2s –2ut ––––––– = a t2 Changing the subject of a formula (a) Simplify

  14. 2s 2u –– – –– = a t2 t Changing the subject of a formula (a)

More Related