Grit on Instagram: "Tractors don’t shift gears like normal vehicles. A farming tractor gearbox is one of the most complex manual systems on wheels, built for torque, precision, and constant load rather than speed. Instead of a single gear lever, tractors often use multiple levers controlling main gears, range selectors, creeper gears, and sometimes high-low or shuttle shifts. This creates dozens of possible gear combinations, allowing the machine to move at extremely slow speeds with massive pul

@solved_science on Instagram: "Motorizing a wheelbarrow shifts most of the load from human muscles to mechanical power, using torque from a small engine or electric motor to handle weight, slope resistance, and continuous movement. This reduces strain on the spine, arms, and knees while improving speed and control on uneven surfaces. This modification is done to prevent long-term injuries, increase daily productivity, and allow one worker to move heavy materials safely without exhaustion. #const