# With an average acceleration of -1.2 m/s^2, how long will it take a cyclist to bring a bicycle with an initial speed of 6.5 m/s to a complete stop?

Jan 27, 2017

time =5.41s

#### Explanation:

$a = - 1.2 \frac{m}{s} ^ 2$
${v}_{i} = 6.5 \frac{m}{s} ^ 2$
${v}_{f} = 0$
$\Delta t$=?

we use formula

$a = \frac{{v}_{f} - {v}_{i}}{t}$

$- 1.2 = \frac{0 - 6.5}{t}$
$t = 5.41 s$