# Non realistic world of physics

**Classical Mechanics**Level 4

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 \(g = 10\text{ m/s}^2 \).