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In $1954,$ Roger Bannister became the first human to run a mile in less than 4 minutes. Suppose that a runner on a straight track covers a distance of 1.00 mi in exactly 4.00 min. What is his average speed in (a) $\mathrm{mi} / \mathrm{h},$ (b) $\mathrm{ft} / \mathrm{s},$ and $(\mathrm{c}) \mathrm{m} / \mathrm{s}$ ?

15 mile $/ \mathrm{hr}, 22 \mathrm{ft} / \mathrm{s}, 6.7 \mathrm{m} / \mathrm{s}$

Physics 101 Mechanics

Chapter 2

Motion along a Straight Line

Physics Basics

Motion Along a Straight Line

Motion in 2d or 3d

Newton's Laws of Motion

Hope College

University of Sheffield

McMaster University

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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So let X b positive xB the direction off in which the runner travels, and we know that the average is displacement. Annex direction over time found. We also know that one life, but are is one point 466 feet or second. It is quite the set off point for Ford 70 per second. Now let's use theirs in questions on these conversions to find the average velocity in mine's. But I'd lust so Sissy Quinto one Mile, which is our ethics and 13. It's given to before minutes, but we have to convert it into ours to get the velocity in terms ofthe in units off my spot. So we know that one God, 60 minutes we get this value of velocity to be 15 miles. But now, for the second part, we have to convert the velocity that we got in first part in tow, Fates for second. So we multiplied by the number ofthe feeds, or second we have in one mile. But art killed. That would be one point home 66 for a second in one might, but and we got that answer will be I didn't find you Second for the last last part. You have to find on certain terms ofthe meet up a second. So we know that and one mind fled. I, their CEO 0.4470 meter per second. So we want to play that factor in tow. This answer and we get this value to be 6.4 seater. Me too.

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