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ID: 1879495 • Letter: M
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MyLeb and Mastering x Course Home |Not secure lopenvellum.ecollege.com/course.html?courseId=14887023&OpenVellumHMAC:38a9e141499b2efladd5f35Bd3b8312941000| × YG chegg Study | Guided Sc Movies- AdmitOne : Apps M Gmail YouTubeMo es Adm tOne Online Editor-Gram ONE. UF- my ufledu O ca as MyUFHealth p Mail a paulin@ f - UF-Student Self Se D ADEA DentaISchoo PHY2053 Fall 2018 Alexander Course Home Mastering Physics 3 My Courses Homework 3: Sections 3.7 to 4.5 Item 10 10 of 12 Course Home Assignments Scores eText Study Area Course Tools Submit Constants Periodic Table incorrect. Try Again: 4 attempts remaining Scallops eject water from their shells to provide a thrust force. (Figure 1) shows a smoothed graph of actual data for the initial motion of a 25 g scallop speeding up to escape a predator Part B Figure 1 of 1 How does this force compare to the 0.25 N weight of the scallop? v (m/s) 0.3 O This force is 1/10 of the weight of the scallop. This force is 1/25 of the weight of the scallop O This force is 1/15 of the weight of the scallop. This force is 1/5 of the weight of the scallop 0.2 Submit 0.0 Provide Feedback Next > 0.0 0. 0.2 0.3 O Type here to search 7:12 PM 9/15/2018Explanation / Answer
(B) We can calculate the acceleration from the graph
acceleration = Change in velocity / change in time = 0.2 /0.2 = 1 m/s2
hence the net thrust force will be
FT = ma = (25*10-3)1 = 0.025 N
Now when we compare it with the weight of scallop
= FT / weight = 0.025/0.25 = 1/10
hence the correct option is 1/10 of the weight of the scallop .
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