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What is average magnitude of this viscous force?A. $4 \times 10^{-7} \mathrm{N}$B. $1.7 \times 10^{-8} \mathrm{N}$C. $9 \times 10^{-9} \mathrm{N}$D. $5 \times 10^{-10} \mathrm{N}$

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Physics 101 Mechanics

Chapter 4

Newton's Laws of Motion

Physics Basics

Motion Along a Straight Line

Motion in 2d or 3d

University of Washington

Simon Fraser University

Hope College

University of Sheffield

Lectures

03:28

Newton's Laws of Motion are three physical laws that, laid the foundation for classical mechanics. They describe the relationship between a body and the forces acting upon it, and its motion in response to those forces. These three laws have been expressed in several ways, over nearly three centuries, and can be summarised as follows: In his 1687 "Philosophiæ Naturalis Principia Mathematica" ("Mathematical Principles of Natural Philosophy"), Isaac Newton set out three laws of motion. The first law defines the force F, the second law defines the mass m, and the third law defines the acceleration a. The first law states that if the net force acting upon a body is zero, its velocity will not change; the second law states that the acceleration of a body is proportional to the net force acting upon it, and the third law states that for every action there is an equal and opposite reaction.

04:16

In mathematics, a proof is a sequence of statements given to explain how a conclusion is derived from premises known or assumed to be true. The proof attempts to demonstrate that the conclusion is a logical consequence of the premises, and is one of the most important goals of mathematics.

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hard this problem. You have a sell what it's like flagellum, whatever they call it Te'o. And it has a massive 1 to 10 to the negative 12 grams, which I have already converted. Two kilograms since we're doing force and it can move at 0.3 meters per second and um, the if it goes to rest, it will come to a stop in 0.1 nanometers. And so we want to find. And it comes to stop because of the viscous fluid that it's swimming in brings to a stop. So we want to figure out the force of the biscuits food that the main to the force viscous fluid that causes this this forward movement of 0.3 meters per second to, um basically stopped still becoming because it's fighting this force here. Find the average me to this force and then that I just didn't read. There's actually straightforward. We know that the F zero so zero squared minus the initial 0.3 squared is equal to two a acceleration. The extraction have the distance of one point a one nana meters, which is one times 10 to the negative 11th right? Yes. Okay. Want us to think about it this way? It said earlier, Uh, minus the initial length. So zero cause we're just going from zero to one times 10 to the negative 11th. But all right, so this is equal to a negative, Uh, nine times, 10 to the negative. Sixth, you go to a eggs groups. It was the celebration of X terms two times 10 to the negative 11th. So the exploration of X is equal to ah, 9 November two is 4.5 negad tending of six, divided by 10 to the negative 11. Like adding 11. So that will make it five right before. Nope to miss it. Checking my old notes that I will make sure to stop Nordmann, right? Okay, cool. Okay, so there's exploration. So the force is gonna be equal to that's acceleration acting on the mass. So we have, um it's the absolute value of the mass, which is one times 10 to the negative. 15 kilograms times the force, which is equal to 4.5 times 10 to the negative 10 Newtons. Or since you're given options, a three deed would round this to five times 10 to the negative 10 Nunes, which is option D and we're done

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