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Rearranging Formulae

Rearranging Formulae. Why rearrange formulae?. Sometimes to find answers to calculations we need to rearrange the formulae to get the unknown we want. There is a methodical way to do this using the ideas we use for solving equations by working backwards. -u. ÷ a. -u. ÷ a.

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Rearranging Formulae

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  1. Rearranging Formulae

  2. Why rearrange formulae? Sometimes to find answers to calculations we need to rearrange the formulae to get the unknown we want. There is a methodical way to do this using the ideas we use for solving equations by working backwards.

  3. -u ÷ a -u ÷ a Example: The final speed of an object is given by the equation v = u + at, where u = initial speed, a = acceleration and t = time. What is the formula for finding the time? If v = u + at then we need to move all the letters associated with t onto the other side of the equation v = u + at subtract the u first as it is not connected with t So we now have v – u = at at means a x t so we need to now divide by the a So the final formula for t is t = v – u a

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