Answer: The kinetic energy of a 55 kg object moving at a velocity of 9 m/s is 2,947.25 joules (J).
Step-by-step explanation:
Kinetic energy (KE) is given by the formula KE = (1/2)mv^2, where m is the mass of the object in kilograms and v is the velocity of the object in meters per second.
Substituting the given values, we have KE = (1/2)(55 kg)(9 m/s)^2 = 2,947.25 J.
Therefore, the kinetic energy of the object is 2,947.25 J.