Table 3

Change in translational and rotational head velocities due to H2G impacts in the HS age group

ΔVR (m/s)ΔωR (rad/s)α(°)Δtwindow (s)
Mean3.023.4−47.60.06
SD1.110.826.80.02
Range1.5–4.910.1–43.3−79.6 to 0.20.04–0.10
  • α (°), direction of head translational velocity vector with respect to the horizontal, (-) indicates the vector points below the horizontal; H2G, head-to-ground impact; HS, high school; ΔωR, change in resultant rotational velocity due to impact; Δtwindow, impact interval; ΔVR, change in resultant translational velocity due to impact.