Determine the gross force needed to bring a car that is traveling at 110 km/h to a full stop in a distance of 100 m. The mass of the car is 2,100 kg. What happens to the initial kinetic energy? Where does it go or to what form of energy does the kinetic energy convert?
What will be an ideal response?
force100 m = 0 ? 980,324 N·m
Force = -9,803 Newtons
Therefore, the force needed to stop the car is -9,803 N. The negative sign indicates the
force must be applied in the opposite direction to motion.
The kinetic energy is converted into heat.
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