Police lieutenants, examining the scene of an accident involving two cars, measure the skid marks of one of the cars, which nearly came to a stop before colliding, to be 78 m long. the coefficient of kinetic friction between rubber and the pavement is about 0.90. estimate the initial speed of that car assuming a level road.

37.11231 m/s

Explanation:

u = Initial velocity

v = Final velocity = 0

s = Displacement = 78 m

g = Acceleration due to gravity = 9.81 m/s²

= Coefficient of kinetic friction = 0.9

Acceleration is given by

Equation of motion

The initial speed of that car is 37.11231 m/s

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