If you are driving at 20 m/s and slam on your brakes and skid at 0.5 g to a full stop, the skidding time in seconds is
A) about 5.
B) about 3.
C) about 4.
D) about 6.
E) more than 6.

Question

Quizplus · Accepted Answer

The skidding time can be calculated using the formula $t = \frac{v}{a}$, where $v$ is the initial velocity (20 m/s) and $a$ is the deceleration (0.5g, with $g = 9.8 \, \text{m/s}^2$). Thus, $a = 0.5 \times 9.8 = 4.9 \, \text{m/s}^2$, and $t = \frac{20}{4.9} \approx 4$ seconds.

If You Are Driving at 20 M/s and Slam on Your