Calculate the force required to pull a copper ball of radius 3.50 cm upward t hr

Question

Calculate the force required to pull a copper ball of radius 3.50 cm upward t hrough a fluid at the constant speed 7.00 cm/s. Take the drag force to be proportional to the speed, with proportionality constant o.950 kg/s. Ignore the buoyant force. differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully, N Need Help? Resd Ht Show My Work What steps or reasoning did you use? Your work counts towards your score We find the drag force by multiplying the proportionality by the constant speed Uploaded File (10 ie maxim

Explanation / Answer

Solutions,

F = drag force + weight

Mass of ball, m = 4 pi rho r^3 / 3

= (4/3) x 3.14 x (8.92 x 10^3) x (0.035) ^3 = 1.60 Kg

So, force F= mg + bv

= (1.60)(9.8) + (0.950)(0.07) = 15.75 N

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