Impulse = Change in momentum F Dt = mvfinal – mvinitialĪs the impulse produced by the athlete is closely related to the velocity and acceleration with which the athlete leaves the block a large impulse is necessary for greater acceleration from the block. This increase in acceleration from back to front (following the athlete’s centre of mass (COM)) helps to propel the sprinter away from the blocks. The results demonstrate that the front foot produces a higher velocity, acceleration, and therefore momentum than the rear foot and consequently the impulse produced by the front foot is also greater. The data has been exported into excel and force, momentum and impulse have been calculated (see spreadsheet provided). The video has been digitised and calibrated and still images have been captured from the video to show the stages of the sprint start in detail. Quintic software allows a variety of kinematic and kinetic variables, such as velocity, acceleration, impulse, momentum and force, to be calculated. Using video footage of a sprinter leaving the blocks the impulse applied by the athlete to the blocks and the athlete’s momentum leaving the blocks can be demonstrated. ![]() ![]() If each side is multiplied by dt: F x dt = d(mv).Impulse-momentum relationship : this relationship relates the momentum of an object to a force and the time over which the force acts.
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