Welcome Guest Search | Active Topics |

 EK ICE1 Question 5 Previous Topic Next Topic
 leahjinx #1 Posted : Friday, June 15, 2018 6:07:56 PM Rank: NewbieGroups: Joined: 6/15/2018Posts: 0Thanks: 0 timesWas thanked: 0 time(s) in 0 post(s) Hey,I'm completely lost on this question. I understand that the muscle force will be reduced as the force required to life the weight is less because the Fg in the opposite direction is decreased. I don't understand how the decreased Fg doesn't change acceleration? I'm not sure if this makes sense but is it because if the upward force (muscle force) is decreased and the downward force (Fg) is decrease then the overall Fnet stays the same, so ma would also be the same? Back to top User Profile
 mhamw #2 Posted : Saturday, June 16, 2018 2:45:41 PM Rank: NewbieGroups: Joined: 5/16/2017Posts: 0Thanks: 0 timesWas thanked: 0 time(s) in 0 post(s) Hi leahjinx,You are on the right track. You can break up this problem into 2 parts. Part 1: isometric contraction --> F(net) = 0F(gravity) is reduced, so F(muscle) is reduced.You can think of this part as "controlling for gravity". Part 2: concentric contraction --> F(net) > 0The added F(muscle) is the same, so F(net) is the same.Thus, acceleration will also be the same.Although a smaller F(muscle) is used to control for gravity, the isometric contraction in both cases brings the system to equilibrium before increasing the stimulation by an equal amount. Regards,Milad Back to top User Profile
 Users browsing this topic Guest
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Clean Slate theme by Jaben Cargman (Tiny Gecko)
Powered by YAF | YAF © 2003-2009, Yet Another Forum.NET
This page was generated in 0.093 seconds.