Kinematics and forces
Lesson 8 of 10
The SUVAT equations
Objective. Select and apply the right constant-acceleration equation.
The key idea
List s, u, v, a, t and mark the three you know plus the one you want. Choose the equation containing exactly those four letters.
Worked example
u = 5 m/s, a = 2 m/s², t = 4 s. Find s.
- 1Use s = ut + ½at².
- 2s = 5(4) + ½(2)(16).
- 3s = 20 + 16 = 36.
Answer: 36 m
Practice
Each question comes with a picture and a listen button. Try it first, then reveal the answer.
Common mistake. Using SUVAT when the acceleration is not constant.
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