Kinesiology 2241A/B Lecture Notes - Lecture 10: Resultant Force, Stick Figure

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Lab #2: divide the high jump task into two phases: the first is when the jumper is on the ground and approaching the bar, the second is when the jumper is airborne. The path(cid:449)a(cid:455) of the o(cid:448)e(cid:396)all (cid:272)e(cid:374)te(cid:396) of (cid:373)ass of the ju(cid:373)pe(cid:396) is u(cid:374)de(cid:396) the ju(cid:373)pe(cid:396)(cid:859)s (cid:272)o(cid:374)t(cid:396)ol du(cid:396)i(cid:374)g the fi(cid:396)st phase (cid:449)he(cid:374) they are on the ground. Befo(cid:396)e the athlete(cid:859)s takeoff, thei(cid:396) feet a(cid:396)e o(cid:374) the g(cid:396)ou(cid:374)d a(cid:374)d thei(cid:396) (cid:272)e(cid:374)te(cid:396) of g(cid:396)a(cid:448)it(cid:455) is within their body, allowing them to have great control over it. As soon as they leave the ground and alter their body into a bendy shape, their center of mass is outside of their body and they can no longer control it as well. The up(cid:449)a(cid:396)d (cid:373)o(cid:448)e(cid:373)e(cid:374)t of the leadi(cid:374)g leg a(cid:374)d the a(cid:396)(cid:373) ulti(cid:373)atel(cid:455) (cid:272)o(cid:374)t(cid:396)ol the ju(cid:373)pe(cid:396)(cid:859)s o(cid:448)e(cid:396)all (cid:272)e(cid:374)te(cid:396) of mass, by determining the vertical velocity.

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