Centripetal Force, very simple.

[nothing4me]

Homework Statement

A man hanging upside down is holding a partner who weighs 475 N. Assume that the
partner moves on a circle that has a radius of 6.50 m. At a swinging speed of 4.00 m/s,
what force must the man apply to his partner in the straight-down position?

Homework Equations

F=mv^2/r

The Attempt at a Solution

I just plugged in the numbers and got 1,169. Is it correct?

 

[tiny-tim]

A man hanging upside down is holding a partner who weighs 475 N. Assume that the
partner moves on a circle that has a radius of 6.50 m. At a swinging speed of 4.00 m/s,
what force must the man apply to his partner in the straight-down position?
…
F=mv^2/r
…
I just plugged in the numbers and got 1,169. Is it correct?

Hi nothing4me!

That's the correct centripetal force, but you still have to deal with the gravitational force.