Question $9$

$(1$ points$)$

Consider the woman doing push$-$ups in the figure shown below. The triceps muscle at the back of her upper arm allow her to exert a net force on the ground; the upward reaction force from the ground back to the woman's arms is shown in the figure. For a situation where she maintains that position $($ie$.$ no movement$)$ what force do the tricep muscles allow her to apply to the ground?

$m=50\mathrm{.}0kg$

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