Unformatted text preview: drag force and the corresponding mass are 002347 . ) 10 201 . 3 ( 328 . 1 Re 328 . 1 5 . 5 5 . = × = = L f C N 0.0695 = m/s kg 0.0695 = 2 m/s) )(10 kg/m (1.184 ] m ) 5 . 5 . 2 )[( 002347 . ( 2 2 2 3 2 2 ⋅ × × = = ∞ V ρ s f D A C F The mass whose weight is 0.069 N is g 7.08 kg 0.00708 = = = = 2 2 m/s 9.81 kg.m/s 06915 . g F m D Therefore, the mass of the counterweight must be 7 g to counteract the drag force acting on the plate. Discussion Note that the apparatus described in this problem provides a convenient mechanism to measure drag force and thus drag coefficient. 726...
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 Fall '10
 Dr.DanielArenas
 Thermodynamics, Convection, Force, Mass, 0.5 m, 0.06915 kg, 0.0695 kg

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