What is the kinetic energy of a car weighing 1 tonne at a speed of 72 km / h?

Let’s write down what we have given in the problem and what needs to be found, our mass is given in tons, we will translate into kilograms in SI, we get 1000 kg, our speed is in km / h, we will translate into SI, multiply by 1000 meters, divide by 60 * 60 seconds we get 20 m / s.
Let us write the formula for kinetic energy, where m is the mass of the car, v is the speed of the car.
Substituting numerical values in SI into the formula, we get 200,000 J, or 200 kJ
Answer: the kinetic energy of the car is 200kJ.