Brainlag PlusFind any quantity in a formula from science or finance: rearrange first, or substitute and solve.
Substitute, then solve
If v = u + at and you know v, u and a, put the numbers in and solve for t, or rearrange first and then substitute.
Both give the same answer.
- s = ut + ½at², s = 54, u = 3, t = 6
- 54 = 18 + 18a
- 18a = 36, so a = 2
The rest of this lesson and its 7 practice questions are in Plus.
Screen 1 of 3, free to read.
- 7 exam-style questions, marked as you go, each with a worked solution
- The Scientific Calculator beside every question
- Anything you get wrong is saved to your flashcards