Gibbons, small Asian apes, move by brachiation, swinging below a handhold to move forward to the next handhold. A $8\mathrm{.}5$ kg gibbon has an arm length $($hand to shoulder$)$ of $0\mathrm{.}60$ m$.$ We can model its motion as that of a point mass swinging at the end of a $0\mathrm{.}60-$m$-$long, massless rod. At the lowest point of its swing, the gibbon is moving at $3\mathrm{.}4$ m$/$s$.$ What upward force must a branch provide to support the swinging gibbon?

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This is a problem of circular motion where gravity and the force from the branch are pulling the gib... View the full answer