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(1) What must your car's average speed be in order to travel 235 $\mathrm{km}$ in 3.25 $\mathrm{h} ?$

$72.3 \mathrm{km} / \mathrm{h}$

Physics 101 Mechanics

Chapter 2

Describing Motion: Kinematics in One Dimension

Physics Basics

Motion Along a Straight Line

Motion in 2d or 3d

Newton's Laws of Motion

Cornell University

University of Michigan - Ann Arbor

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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(I) What must be your car&…

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(I) What must your car…

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(1I) Calculate the average…

this's Chapter two problem too. So in this problem were given that you traveled a distance. So we'll call it Delta X of 235 kilometres and we know that it took you 3.25 hours. So in other words, 3.25 hours is the total time of travel. So for this bit of travel, we know the distance. We know the total time and we're looking for the average speed so we can use this equation that average speed here equals distance. So that is our Delta X, and we get that from a peer divided by total time and were given that here. So at this point, we know values for everything in our equation, our distance over the total time. Just divide one by the other and you get your answer, which is 72.3 kilometers per hour. Notice that the numbers to 35 3.25 divided to make that 72.3 and the unit's kilometers an hour is divide to make kilometers per hour, which is a perfectly reasonable unit for a speed. So we'll leave it at that. That's your answer

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