First slide

Average Acceleration

Question

When the speed of a car is u, the minimum distance over which it can be stopped is s. If the speed becomes nu, what will be the minimum distance over which it can be stopped during the same time?

Easy

A

s/n
B

ns
C

$\frac{s}{n^{2}}$
D

$n^{2} s$

Solution

$v^{2} - u^{2} = 2 a s, v = 0$ , $s \infty u^{2}$

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