ch06-p048 - mg . Thus, F net = ( mg ) 2 + ( m v 2 / R ) 2 =...

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48. (a) We note that the speed 80.0 km/h in SI units is roughly 22.2 m/s. The horizontal force that keeps her from sliding must equal the centripetal force (Eq. 6-18), and the upward force on her must equal
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Unformatted text preview: mg . Thus, F net = ( mg ) 2 + ( m v 2 / R ) 2 = 547 N. (b) The angle is tan 1 [ ( mv 2 / R ) / ( mg ) ] = tan 1 ( v 2 / gR ) = 9.53 (as measured from a vertical axis)....
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