Final answer:
The kinetic energy of the car must be dissipated to bring it to a stop. The amount of kinetic energy can be calculated using the formula KE = 1/2 * m * v^2, where m is the mass of the car and v is its velocity. After converting the mass and velocity to the appropriate units, we can substitute the values into the formula to find the answer.
Step-by-step explanation:
The kinetic energy of a moving object is given by the formula KE = 1/2 * m * v^2, where m is the mass of the object and v is its velocity. In this question, the car has a mass of 1.5 t (1t=10^3kg) and is traveling at 50 km/h. To calculate the kinetic energy, we need to convert the mass to kg and the velocity to m/s:
Mass of the car = 1.5 t = 1.5 * 10^3 kg
Velocity of the car = 50 km/h = (50 * 1000) / 3600 = 13.89 m/s
Now we can substitute the values into the formula:
KE = 1/2 * 1.5 * 10^3 * (13.89)^2 = 905625 J
Therefore, the amount of kinetic energy that must be dissipated to bring the car to a stop is 905,625 Joules.