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March 26, 2017

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A car moving at a speed of approximately 176.5 km/h. 923 m in front of the car, there is a truck moving at a speed of 84.2 km/h in the same direction.

1.What is the name of the physical process that would occur if both vehicles kept moving at constant speed?
2. How long would it take until this process occurred?
3. What is the minimal deceleration needed for the car in order to avoid the
physical encounter with the truck?The truck keeps moving at constant speed.
4. If the mass of the car (including passengers, bags, etc.) is 1769 kg, what is the minimal work that needs to be done by the friction force of the car's brakes in order to avoid hitting the truck from behind?

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