Question

A car skids to a stop on a horizontal surface. The speed of the car goes down by $6.0m/s$ each second as it is skidding.
What is the coefficient of friction between the tires and the road?

• A. $0.61$
• B. $0.52$
• C. $0.3$
• D. $1.63$
• E. $0.98$

Answer 1

Answer: (A)

$0.61$

The deceleration of the car is given by $a=\frac{\Delta v}{\Delta t}$

$=6m/s^2$

The force of friction that causes the deceleration=$\mu g=6$

$⟹\mu =\frac{0.6}{9.81}=0.61$