# Non realistic world of physics

There is a car of mass 1234 kg without any acceleration and velocity $$7 \text{ m/s}$$ at t = 0 . Start moving in a rough surface of friction coefficient of 0.1 for first 5 m of distance and then 0.2 for next 30 m then tell in how much time will the car take to stop itself

Take the assumption that tyres can't deform its shape, and take $$g = 10\text{ m/s}^2$$.

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