The drag force is an important fact of life for the small marine crustaceans cal

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The drag force is an important fact of life for the small marine crustaceans called copepods. The drag force for small objects in water is very different from the drag force in air, so the drag equations of this chapter don't apply. However, we can estimate the drag force from data. The velocity graph of (Figure 1) shows two phases of the swimming motion of a 1.6 mg copepod. First it swims vigorously, speeding up; then it slows down under the influence of drag.

MasteringPhysics: Ch 05 HW-Google Chrome https://session.masteringphysics.com/myct/itemView?assignmentProblemID-58 1861 07&offset;=next General Physics I - Spring 2016 Signed in as bayan al yaqoob Help Close Ch 05 HW Problem 5.62 Resources previous | 8 of 12 | next » Problem 5.62 Part A What is the magnitude of the drag force? Express your answer to two significant figures and include the appropriate units. The drag force is an important fact of life for the small marine crustaceans called copepods. The drag force for small objects in water is very different from the drag force in air, so the drag equations of this chapter don't apply However, we can estimate the drag force from data. The velocity graph of (Fiqure 1) shows two phases of the swimming motion of a 1.6 mg copepod. First it swims vigorously, speedi influence of dra then it slows down under the D--7.35N Submit My Answers Give Up Figure 1 of 1 Incorrect Iry Again, 5 attempts remaining Vx (m/s) Part B 0.80 0.60 0.40 0.20 0 What is the ratio of the drag force to the copepod's weight? Express your answer using two significant figures. 0 0.10 0.20 0.30 0.40 Submit My Answers Give Up ide Feedback Continue 4:47 PM Search the web and Windows 0 ^)) ENG 2/14/2016 |

Explanation / Answer

a = dv/dt

a = -.70/.20 = -3.5 m/s^2

F = ma

F = 1.6 x 10^-6 kg * -3.5 = 5.6 x 10^-6 N

part b )

D/w = 3.5 / 9.8 = 0.36

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