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Centripetal force = (m × v²) ÷ r. Since velocity is squared, doubling the speed increases centripetal force by four times. This is important in rotating machinery and vehicle cornering, as small increases in speed greatly increase the forces required to maintain circular motion.

According to Newton’s Third Law, every action has an equal and opposite reaction. Pushing downward on the ground creates an upward reaction force that propels you into the air. This law underpins many machine operations, from engines to propulsion systems.

Tweezers are third-class levers: the fulcrum is at one end, effort applied in the middle, and the load at the tips. Third-class levers increase speed and precision, though they do not provide mechanical advantage.

A cube has 8 vertices (corners), 12 edges, and 6 faces. Basic geometric visualization skills are critical in interpreting mechanical diagrams and solving spatial reasoning problems.

A fixed pulley changes the direction of force but does not reduce the effort required. The mechanical advantage is 1. Movable or compound pulleys, however, provide mechanical advantage by distributing force.