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  2. Drafting (aerodynamics) - Wikipedia

    en.wikipedia.org/wiki/Drafting_(aerodynamics)

    It begins as normal drafting, but the following car pulls up behind the lead car and bumps into the rear of it, pushing the lead car ahead, to maintain momentum. If done roughly or in the wrong position (e.g. close to the entry of the turn), this tactic can destabilize the handling of the lead car, sometimes causing a crash.

  3. Pacemaker (running) - Wikipedia

    en.wikipedia.org/wiki/Pacemaker_(running)

    The rules for pacemakers specify that not more than three of them are dedicated to one group of runners. [11] In the 2003 Berlin Marathon, Paul Tergat (Kenya) set a new world record with 2:04:55; pacemaker Sammy Korir finished 1 second behind in second place. At 34.5 km (21.5 miles) into the run, Korir tried, unsuccessfully, to make a move on ...

  4. Slipstream - Wikipedia

    en.wikipedia.org/wiki/Slipstream

    A slipstream is a region behind a moving object in which a wake of fluid (typically air or water) is moving at velocities comparable to that of the moving object, relative to the ambient fluid through which the object is moving. [1] The term slipstream also applies to the similar region adjacent to an object with a fluid moving around it.

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  6. Biomechanics of sprint running - Wikipedia

    en.wikipedia.org/wiki/Biomechanics_of_sprint_running

    During the initial stage of sprinting, the runners have their upper body tilted forward in order to direct ground reaction forces more horizontally. As they reach their maximum velocity, the torso straightens out into an upright position. The goal of sprinting is to reach and maintain high top speeds to cover a set distance in the shortest ...

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  8. Technical drawing - Wikipedia

    en.wikipedia.org/wiki/Technical_drawing

    A cutaway drawing is a technical illustration, in which part of the surface of a three-dimensional model is removed in order to show some of the model's interior in relation to its exterior. The purpose of a cutaway drawing is to "allow the viewer to have a look into an otherwise solid opaque object.

  9. Lofting - Wikipedia

    en.wikipedia.org/wiki/Lofting

    As ship design evolved from craft to science, designers learned various ways to produce long curves on a flat surface. Generating and drawing such curves became a part of ship lofting; "lofting" means drawing full-sized patterns, so-called because it was often done in large, lightly constructed mezzanines or lofts above the factory floor.