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Figure 2.42 shows the position of a moving object as a function of time. (a) Find the average velocity of this object from points $A$ to $B, B$ to $C,$ and $A$ to $C .$ (b) For the intervals in part (a), would the average speed be less than, equal to, or greater than the values you found in that part? Explain your reasoning.

a)3$m i s$1.5 $\mathrm{m} / \mathrm{s}$1.8 $\mathrm{m} / \mathrm{s}$b)Average speed will be the same as average velocity because the motion of the object is uniform and unidirectional.

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

University of Washington

Simon Fraser University

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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Figure 2.42 shows the posi…

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An object moves along the …

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Refer to the position-vers…

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In which of the velocity-v…

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Figure $3.24$ gives the $x…

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An object moving in a stra…

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A plot of position versus …

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A velocity-time graph for …

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Figure $3.25$ gives a spee…

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Average velocity The graph…

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A graph of position versus…

the madam occurs, we have given our ex a witch's Edo X is TV done. XY is goingto be nine. Me don't nine months in Seattle, Time to travel. Toby is one second for saving his five seconds. Now, for the first part, we have to find the average velocity it is given by on the change in displacement or displace that the shortest distance traveled All my in fact. So for it to be me average is X B minus X over thinking bee minus t it. And this is a good maitre over one seconds because x a zero and zero. Come on. This little Logan's out, Toby, to meet a close second from the scene. The ever it is XY minus experience over three C minus Davey and this is a little $6 over four seconds. And this could come slow toe B, 1.5 meters per second. Similarly, for it, you see average. Is this placement from seat away said he found it. Two c. It's this's both basically the same. So it doesn't matter how you see this is a 19 year old five seconds. This is called the one on the second Now for the second part, the velocity is always in the same direction. Mattis. Positive ex direction. So the distance job is equal to displacement. In each of the case, on the average speed is same as the magnitude off the average velocity. So these two are bars physically present the magnitude ofthe the average velocity.

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