@article{ref1,
title="Lawn mower ballistics",
journal="Association of Firearm and Toolmark Examiners journal",
year="2022",
author="Nennstiel, Ruprecht",
volume="54",
number="1",
pages="38-48",
abstract="Rotating parts of machines carry the risk of causing accidents. In this paper, the case of a piece of stucco being &quot;thrown&quot; by the rotating blade of a rotary lawn mower will be discussed. To reconstruct its ballistic trajectory, among other data, the knowledge of the departure velocity is required. While this is not a major hindrance for bullets fired from a gun, as the muzzle velocity can easily be determined, measurement is not a realistic option for objects being propelled accidentally by a rotating machine. The major challenge of this paper is to determine from pure physical principles a realistic estimate for the departure velocity of an object accelerated by a rotor. Different physical models of the acceleration process are discussed, and the resulting exterior ballistic trajectories will be shown.   Keywords: Ballistics, Collision model, Lagrange formalism, Lawn Mower, Sliding motion model, Trajectory Reconstruction<p /> <p>Language: en</p>",
language="en",
issn="1048-9959",
doi="",
url="http://dx.doi.org/"
}