Year 11 Maths - Specialist Kinematics

Constant Acceleration

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Questions

Question 1

58017

A car is travelling at $30\,m/s$ when the brakes are applied. It is brought to rest with uniform deceleration in $4s$. How far did it travel after the brakes were applied?

Answer

$60m$

Worked Solution

$$
\begin{aligned}
u=30 \mathrm{~m} / \mathrm{s},\ & v=0 \mathrm{~m} / \mathrm{s},\ t=4 \\
S&=\frac{1}{2}(u+v) t \\
\quad&=\frac{1}{2}(30+0) \times 4 \\
&=60 \mathrm{~m} .
\end{aligned}
$$

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