In the context of physics, "power" is defined as the rate at which work is performed or energy is transferred. It measures the amount of energy consumed per unit time. In relation to the International System of Units (SI), power's unit is the joule per second (J/s), traditionally known as the watt, named in tribute to James Watt, the steam engine's pioneer developer in the 18th century. The total work performed is determined by power's integration over time. This calculation of work is said to be path dependent, as it rests on the trajectory of the force and torque application point. The power required to move a vehicle, for example, is the product of the wheels' traction force and the vehicle's velocity. Similarly, the output power of an electric motor is the product of the generated torque and the output shaft's angular velocity. In a different aspect, power measures the rate at which a light bulb transforms electrical energy into heat and light, and it's quantified in watts. A bulb with higher wattage uses more power, implying it consumes more electrical energy per unit time.