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**1. A police officer investigating an accident estimates from the damage done that a moving car hit a stationary car at 25 km/h. If the moving car left skid marks 44 m long, and if the coefficient of kinetic friction is 0.68, what was the initial speed of the moving car?**

**2. Homework Equations**

fk = μk N

F = ma

**3. The Attempt at a Solution**

drew a free body diagram, converted 25 km/h to 6.94 m/s