Question

Consider a car moving on a straight road with a speed of $100\, m/s$. The distance at which car can be stopped, is : $[\mu_k = 0.5]$

• A. $800\,m$
• B. $1000\,m$
• C. $100\,m$
• D. $400\,m$

Answer 1

Answer: (B)

$1000\,m$

Answer 2

$s=\frac{v^{2}}{2\mu\,_{k}g}=\frac{100\times100}{2\times0.5\times10}$ $=\frac{100\times 100}{5\times2}=1000\,m$