PHIL 1050 Chapter : Pg. 35-47 Chapter Notes

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azurecrow744

17 Dec 2011

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Ancient astronomy was most developed subject in the physical sciences. Ancient astronomy was based on naked-eye observations of the positions of the stars. Aristotle developed a science of biology, a theory of cosmology, a theory of motion, & a theory of the constitution of matter. & most importantly theory of how to conduct inquiry. By a. d ptolemy had developed a theory of motion of the planets that was better than aristotles. Archimedes made more enduring contributions to physics than did aristotle. Aristotle"s general conception of how science is to be conducted influenced western civilization until approx 18th century approx 2300 years aristotle"s writings set the standards for scientific explanation & for deductive arguments. Plato & aristotle shared a view about the logical structure of knowledge. Any acceptable answer must give a combination of features shared by all things that are x and by no things that are not x.

Related Questions

How fast can a racecar travel through a circular tum without skidding and hitting the wall? The answer could depend on several factors:

The weight of the car;
The friction between the tires and the road;
The radius of the circle;
The “steepness” of the turn.

In this project, we investigate this question for NASCAR racecars at the Bristol Motor Speedway in Tennessee. Before considering this track in particular, we use vector functions to develop the mathematics and physics necessary for answering questions such as this.

A car of mass m moves with constant angular speed to around a circular curve of radius R (Figure 3.20). The curve is banked at an angle . If the height of the car off the ground is h, then the position of the car at time t is given by the function

As the car moves around the curve, three forces act on it: gravity, the force exerted by the road (this force is perpendicular to the ground), and the friction force (Figure 3.21). Because describing the frictional force generated by the tires and the road is complex, we use a standard approximation for the frictional force. Assume that for some positive constant . The constant is called the coefficient of friction.

Let denote the maximum speed the car can attain through the curve without skidding. In other words, is the fastest speed at which the car can navigate the turn. When the car is navigate at this speed, the magnitude of the centripetal force is

The next three questions deal with developing a formula that relates the speed to the banking angle .

Now that we have a formula relating the maximum speed of the car and the banking angle, we are in a position to answer the questions like the one posed at the beginning of the project.

The Bristol Motor Speedway is a NASCAR short track in Bristol, Tennessee. The track has the approximate shape shown in Figure 3.22. Each end of the track is approximately semicircular, so when cars make turns they are traveling along an approximately circular curve. If a car takes the inside track and speeds along the bottom of turn 1, the car travels along a semicircle of radius approximately with a banking angle of . If the car decides to take the outside track and speeds along the top of turn 1, then the car travels along a semicircle with a banking angle of . (The track has variable angle banking.)

The coefficient of friction for a normal fire in Elly conditions is approximately . Therefore, we assume the coefficient for a NASCAR tire in dry conditions is approximately .

Before answering the following questions, note that it is easier to do computations in terms of feet and seconds, and then convert the answers to miles per hour as a final step.

11. Suppose the measured speed of a car going along the outside edge of the turn is . Estimate the coefficient of friction for the car’s tires.

goldpug777

This is the introduction of my scientific poster presentationplease proofread it grammatically and scientifically and give meany suggestions you have! Thanks.

Here it is:

Have you ever thought about why would thrillingrides get you excited, make your heart racing oreven make you start screaming from the depths of your core, forminga bead of sweat on your forehead?

Well, the answer lies in physics. These rides demonstrateparticularly good examples of the physics laws and conceptsinvolved in nature and their effect on us in real-lifeapplications.

Height, weightlessness, high velocity, huge acceleration,centripetal force, impulse and the momentary change in momentum,the work being done and the change in energy, are all factorsthat contribute in making a thrilling ride an exciting one. Thosefactors cause adrenalin rush which leads to a higher bloodpressure thus stimulating the heart. They also put the riderin a lot of uncertainty and unexpected visual cues.

An example of a thrilling ride is the Giant Drop which isa free-fall ride involving the drawing of an eight seat carriage bya cable to the top of the tower. After one minute full of anxiety,the riders are plummeted down a height of 39 stories (almost 115m)then brought to rest within meters from the ground by asophisticated magnetic braking system.

Hi this is the introduction that I have written for my poster. Myposter is on the following URL (please have a look!).

http://i55.tinypic.com/e0g0w5.jpg

Please correct the introduction for any scientific or grammaticalerrors and give me your suggestions about this section as well asthe overall poster. Thanks

This is very important so if you are not good at it pleasedon't answer.

Here is the introduction :

Have you ever thought about why would thrilling rides getyou excited, make your heart racing orsometimes even make you start screaming from the depths of yourcore, forming a bead of sweat on your forehead?

Well, the answer lies in physics. These rides demonstratevery good examples of the physics laws and concepts involved innature and their affect on us in real life applications.

Height, weightlessness, high velocity, hugeacceleration, the sudden impulse and themomentary change in momentum, the work being done and the suddenchange in energy are all factors that contribute inmaking a thrilling ride an exciting one. Those factorsmake adrenalin concentrations in our body system increasecausing higher blood pressure thus stimulating theheart.. They also make the rider in a lot ofuncertainty and unexpected visual cues.

An example of a thrilling ride is the Giant Drop which isa freefall ride involving the drawing of an eight seat carriage bytwin cables to the top of the tower. After one minute full ofanxiety, the riders are plummeted down a height of 39 stories(almost 115m) then brought to a halt within meters from the groundby a sophisticated magnetic braking system.

PHIL 1050 Chapter : Pg. 35-47 Chapter Notes

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