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A baby elephant is stuck in a mud hole. To help pull it out, game keepers use a rope to apply a force $\overrightarrow{\mathbf{F}}_{A},$ as part $a$ of the drawing shows.By itself, however, force $\overrightarrow{\mathbf{F}}_{\mathrm{A}}$ is insufficient. Therefore, two additional forces $\overrightarrow{\mathbf{F}}_{\mathrm{B}}$ and $\overrightarrow{\mathbf{F}}_{\mathrm{C}}$ are applied, as in part $b$ of the drawing. Each of theseadditional forces has the same magnitude $F$ . The magnitude of the result-ant force acting on the elephant in part $b$ of the drawing is $k$ times largerthan that in part $a$ . Find the ratio $F / F_{A}$ when $k=2.00$ .

0.532

04:12

Mitchell C.

Physics 101 Mechanics

Chapter 1

Introduction and Mathematical Concepts

Physics Basics

Simon Fraser University

Hope College

University of Sheffield

University of Winnipeg

Lectures

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.

09:56

In mathematics, algebra is one of the broad parts of mathematics, together with number theory, geometry and analysis. In its most general form, algebra is the study of mathematical symbols and the rules for manipulating these symbols; it is a unifying thread of almost all of mathematics.

0:00

A baby elephant is stuck i…

02:59

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08:18

Solve each problem.Ama…

01:42

Suppose your car was mired…

03:27

A car is being pulled out …

11:05

10:49

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02:20

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07:31

The two blocks in $\textbf…

Oh no, a baby elephant is stuck in a mud hole. Yeah man. So they apply a force and a rope. Oh as the drawing shows. So I'm going to have to open the book but while I opened the book at least I can try to draw an elephant. I am not a good drawer as you will find. Um elephants have like big tears here. Um Okay. Hey that's not terrible. Okay so we gotta figure out these forces and now I've seen the drawing but unfortunately I was supposed to draw it from the elephant from above. Oh well let's pretend that this is a top view and then there's an F. Sub B. And F. Sub C. Okay, back to the book here. They're both 20°. Now this was supposed to be be here and this was supposed to be see down here. Okay. So what do we have here? What's the magnitude and direction? Uh A plus B plus C. Plus D. Okay. The displacement vector A points east. I know I'm looking at the wrong question. Okay. All right. So 48. Okay. It says that the resultant on the elephant is K. Times larger then the resultant in the first drawing and the first drawing only has F. Sub A on it. Okay, So it's gonna be four times no, it's going to be two times larger then F sub. So F. So the resultant is going to be F sub A plus F. Sabi um times the co sign of five to put it in the X direction. F sub C. Co sign of fi and this is going to be two times F sub A. All right. So what are we trying to do here? What's F over F sub Each of these forces has a magnitude of F. Okay, so F sub E equals F sub C. Which are both F. All right, so um subtracting F of F A from both sides. I get F. A. And then um this is just gonna be two f. Kherson and Fi. And again, the question was, what is F over F sub? So rearranging F over F sub A Is going to be 1/2 co signed five. So fi was 20° one over to co sign of 20 0.53 2 0.532. Okay, let's check. And that's correct. Thank you for.

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