Posted by **Anonymous** on Monday, July 19, 2010 at 1:07am.

A 9.5-kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 70 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest point on the circle, it has a speed of 3.4 m/s.

(a) Find the magnitude of the centripetal force acting on the monkey.

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**drwls**, Monday, July 19, 2010 at 4:52am
Fnet = M a = M V^2/R

Tension - M g = M V^2/R

"tension" is the net centripetal force actng upon the monkey by the arm he is swinging with. That is what you want to calculate.

T = M (g + V^2/R)

= 9.5 kg*[9.8 m/s^2 + (3.4^2 m^2/s^2)/0.7 m)]

The answer will be in Newtons.

- physics -
**Anonymous**, Monday, July 19, 2010 at 5:31pm
thanx so much 4 explaining it drwls!!!

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