Final answer:
The kinetic energy of the truck is approximately 24011 Joules.
Step-by-step explanation:
The kinetic energy of an object is given by the formula:
E = 0.5 * m * v^2
Where E is the kinetic energy, m is the mass of the object, and v is the velocity of the object.
In this case, the mass of the truck is 842 kg and the velocity is 30 km/h (or 8.33 m/s).
Plugging these values into the formula, we get:
E = 0.5 * 842 kg * (8.33 m/s)^2
= 0.5 * 842 kg * 69.4 m^2/s^2
= 24011 J
Therefore, the truck has approximately 24011 Joules of kinetic energy.