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Statics
Statics is the branch of mechanics that describes bodies which are acted upon by balanced forces and torques so that they remain at rest or in uniform motion. In statics, the bodies being studied are in equilibrium.
434 Questions
What are some examples of rolling friction?
Some examples of rolling friction include a car's tires rolling on the road, a ball rolling on the ground, and a person riding a bike. Rolling friction occurs when an object rolls over a surface and is caused by the deformation and adhesion of the surfaces in contact.
What are some examples of friction?
Examples of friction include rubbing your hands together to create warmth, the resistance when you push a heavy box across the floor, the slowing down of a car when brakes are applied, and the grip between shoes and a walking surface.
Static shocks are caused by a build-up of static electricity on the surface of an object, such as your body, due to friction or contact with another object. When you come into contact with a conductor (metal, another person, etc.), the excess charge is released in a sudden flow of electricity, creating the shock sensation.
While analyzing the mechanism if mass of the body and inertia force if it is not considered then it is called static force
Explain why clothes dried in a dryer often stick together?
It's called 'static electricity' ... certain fabrics are attracted to each other.
This is because some of the clothes have gained electrons by rubbing against other clothes. The clothes losing electrons become positive. The negative clothes are attracted to the positive clothes.
How do you make material anti-static?
Materials can be made anti-static by adding substances that help dissipate or prevent the buildup of static electricity, such as conducting polymers or metallic coatings. These materials allow the static charges to flow through them more easily, reducing the chances of a static discharge.
Are weight and gravity the same thing in one way?
Weight is affected by gravity. An objects weight is based on its mass and the gravitational field that is pulling on it. The more mass something has, the more gravity pulls on it. I guess you could say they are proportional.
Weight is the amount your mass and the mass of the nearest very large object (in almost all cases, the planet Earth) attract. The force of attraction is called gravity. All objects exert it, but only the Earth (and, for that matter, the Earth's moon) have ever had their gravity directly "felt" by humans.
Your weight changes depending on which planet you are stood on, whilst your mass doesn't (you don't shrink on the Moon just because there is less gravity). Gravity is the same force everywhere, but the amount you "feel" it depends on the size of the planet you are stood on, so it could be said to vary according to the observer's position.
However, this is all a very long way around saying that weight and gravity are not at all the same thing, other than the fact that they two only exist when combined with each other (making them not the same thing, but certainly interdependent). An object has weight if and only if it is in a gravitational field. If you could put Mt Everest into the void of inter-galactic space, it would have absolutely no weight at all. But it would have the same mass as it does anywhere (not counting relativistic effects). This may be what the questioner is driving at with the words "in one way". It's a good connection for the questioner to have made. However, you can have a gravitational field even if there is nothing in it to weigh.
How is static electricity created?
The discharge of electricity between your finger and the doorknob is in principle the same as the discharge from a cloud to a tree during a storm. It occurs because of the general diffusive principle in nature (entropy) -- that is, things try to balance out to equal distribution. If you have a lot of negative charge in one place and a lack of negative charge in another (a positive charge), it will eventually "discharge" or equalize the charges. This is a "lightning bolt" or a "static bolt" depending on how much charge we're talking about.
In a cloud, lots of dust in the cloud is churning around and negative charges accumulate. The earth is the ultimate "equalizer" in nature, so enough negative charge will jump to the ground.
In the same way, when you rub your feet on the carpet, you push negative charges on or off of you; by building up this charge in your body, you cause a static jump the next time you touch something "grounded" (i.e., in contact with the earth).
Static Eletricity is created by rubbing a material on to plastic or another type of cloth.
Who were the static characters in Holes and why?
In "Holes," the static characters are characters whose personalities or traits remain constant throughout the story. Examples include Mr. Sir, who maintains his tough and unyielding demeanor, and the Warden, who remains ruthless and power-hungry. Their lack of change serves to highlight the growth and development of the main character, Stanley Yelnats.
What is the static perspective?
The static perspective is a view that emphasizes stability, permanence, and structure in understanding phenomena. It focuses on studying objects or systems at a single point in time without considering their evolution or change over time. This perspective is common in fields such as physics and certain branches of philosophy.
Islam is concentrated in the Middle East, North Africa, South Asia, and Southeast Asia. Countries with the highest Muslim populations include Indonesia, Pakistan, India, Bangladesh, and Nigeria. Islam is the predominant religion in many of these regions.
What is the meaning of static- theory?
Static theory refers to a principle or model that assumes a system remains unchanged or at equilibrium over time. It is often used in economics to analyze supply and demand relationships when there are no factors causing change.
Is Edward a dynamic or static character?
Edward is a dynamic character. Throughout the story, he undergoes significant changes and development in his personality, beliefs, or actions.
Deviance is not static but can change over time or in different contexts. What is considered deviant behavior can vary across cultures and societies. Additionally, individual perceptions of deviance may evolve based on changing norms and attitudes.
What is an example of static character?
An example of a static character is Mr. Collins in Jane Austen's "Pride and Prejudice." Throughout the novel, Mr. Collins remains consistent in his obsequious and pompous behavior, without undergoing any significant change or development.
Can principal characters be static?
Yes, principal characters can be static, meaning they do not undergo significant internal change or growth throughout a story. They may serve as a stable presence or foil for dynamic characters to interact with, allowing the focus to be on their development instead.
Static characters in The Yellow Wallpaper?
In "The Yellow Wallpaper," the character of John, the narrator's husband, remains static throughout the story. He consistently exhibits controlling and dismissive behavior towards the narrator, failing to evolve or change his perspectives. John's static nature contrasts with the narrator's transformation and descent into madness as the narrative progresses.
How would The Yellow Wallpaper be different if it were told from another character's perspective?
If The Yellow Wallpaper were told from another character's perspective, such as John's, it would likely focus on his perceptions and rationale for his actions. The story may paint a different picture of the narrator's mental state and provide insight into John's perspective on his wife's condition. This shift in perspective could potentially alter the reader's interpretation of the events and themes of the story.
What are some examples of a static character?
A static character remains consistent and does not undergo significant change throughout a story. Examples include Atticus Finch in "To Kill a Mockingbird," Sherlock Holmes in the detective stories by Arthur Conan Doyle, and Gandalf in "The Lord of the Rings."
Math sample papers -math olympaid?
These questions are from the Australasian Maths Olympiad Website.
http://www.apsmo.info/APSMO_Home.php
A. (Time: 3 minutes)
What is the value of:
268 + 1375 + 6179 - 168 - 1275 - 6079 ?
B. (Time: 5 minutes)
Each of 8 boxes contains one or more marbles. Each box contains a different number of marbles, except for two boxes which contain the same number of marbles. What is the smallest total number of marbles that the 8 boxes could contain?
C. (Time: 5 minutes)
Find the whole number which is:
less than 100;
a multiple of 3;
a multiple of 5;
odd, and such that,
the sum of its digits is odd.
D. (Time: 6 minutes)
Takeru has four 1 centimetre long blocks, three 5 centimetre long blocks, and three 25 centimetre long blocks. By joining these blocks to make different total lengths, how many different lengths of at least 1 centimetre can Takeru make?
E. (Time: 6 minutes)
The figure below is made up of 5 congruent squares. The perimeter of the figure is 72 cm. Find the number of square cm in the area of the figure.
Answers
A. - 300
METHOD 1: Make a simpler problem...Notice that each number being added is 100 more than one of the numbers being subtracted.
The value is 100 + 100 + 100 = 300
METHOD 2: Group by operation...Add the numbers 268 + 1375 + 6179 = 7822.
Then add the numbers 168 + 1275 + 6079 = 7522.
Finally, subtract the totals: 7822 - 7522 = 300
B. - 29 marbles
Draw a picture...
Draw 8 boxes. Then put the smallest possible number of marbles in each box. Put 1 marble in box 1. Then put 1 marble in box 2. You can't just put 1 marble in box 3, because that would make three boxes with the same number of marbles. So put 2 marbles in box 3, 3 marbles in box 4, and so on.
The smallest total number of marbles is 1+ 1 + 2 + 3 + 4 + 5 + 6 + 7 = 29 marbles.
C. - 45
Proceed one statement at a time. Eliminate those numbers which fail to satisfy all the conditions.
WHOLE NUMBERS THAT SATISFY ALL CONDITIONS
- Less than 100
1, 2, 3, ..., 99
- Multiple of 3
3, 6, 9, ..., 99
- Also multiple of 5
15, 30, 45, 75, 90
- Odd
15, 45, 75
- Sum of digits is odd
45
D. - 79
METHOD 1: Start with a simpler problem...
(a) Lengths formed by 1 cm blocks: 1, 2, 3, 4.
(b) Lengths formed by remaining blocks: 5, 10, 15; 25, 30, 35, 40; 50, 55, 60, 65; 75, 80, 85, 90.
(c) Each of the fifteen (b) length bocks can be combined with the four (a) lengths, thus producing 15 x 4 = 60 different amounts.
TOTAL AMOUNTS:
(a) 4
(b) 15
(c) 60
GRAND TOTAL:
79 different amounts
METHOD 2
Number of choices for 1cm lengths, including 0, is 5: (0, 1, 2, 3, 4).
Number of choices for 5cm lengths, including 0, is 4: (0, 1, 2, 3).
Number of chioces for 25cm lengths, including 0, is 4: (0, 1, 2, 3).
Total number of choices for all lengths is 5 x 4 x 4 = 80. However, 80 includes the choice of having none of the lengths as a choice. Since it is given that each length must be 1cm or longer, there are 80 - 1 = 79 amounts of at least 1cm.
METHOD 3: Establish a maximum and then eliminate all impossibilities.Find that largest possible length that can be made with the blocks, and then subtract the number of smaller values that cannot be made. The maximum that can be made is 4 + 15 + 75 = 94cm. The 15 lengths less than 94cm that cannot be made are those that require four 5cm blocks. These are 20, 21, 22, 23, 24, 45, 46, 47, 48, 49, 70, 71, 72, 73 and 74cm lengths. The number of possible lengths is 94 - 15 = 79
E. - 180 cm²
Find the length of one side of the figure...
Because of the common dies, all the squares are congruent to each other. The perimeter consists of 12 equal sides. The length of a side is 72 / 12 = 6cm. The area of each square is 6 x 6 = 36cm².
The area of the figure is 5 x 36 = 180cm².
You can buy Maths Olympiad Books
MATHS OLYMPIAD CONTEST PROBLEMS
by Dr George Lenchner
(Australian Edition. 2005. Reprinted with corrections 2008.)
285 pages
ISBN : 978-0-9757316-0-4
MATHS OLYMPIAD CONTEST PROBLEMS Volume 2
(Australian Edition. 2008.)
Editors : R. Kalman, J. Phegan, A. Prescott
320 pages
ISBN : 978-0-9757316-2-8
CREATIVE PROBLEM SOLVING IN SCHOOL MATHEMATICS
by Dr George Lenchner
(Australian Edition. 2006.)
290 pages
ISBN : 978-0-9757316-1-1
What amount of force is needed to bend metal?
Depends on what metal you are refering to. * Aluminum is can be bent at 1 ton * Stainless at 50 ton * Mild Steel at 100 tons * Carbon Steel can be bent at 150 tons. All of these metal depend on the thickness of the material. For example, the thickness of these metal would have to be between the thickness of .25 (quarter inch) to .50 (half inch). Note: It also depends of the quality of the metal. SS 1311-00 steel (Swedish standard), for example, can handle 220N per square millimetre until it reaches its yield point. Once the yield point is passed some fraction of the deformation will be permanent and non-reversible. Answer: Mathematically
Δ = PL3/(48EI) Where: Δ = deflection
L = span
E = Modulus of Elasticity (see link for typicals)
I = Moment of Inertia
b = width
d = depth
I = bd3/12 for a rectangular cross section
What is the purpose of a screw?
The screw is one of the six (or seven) Aristotelian 'Simple Machines' that enable humans to do work by redirecting or focusing force.
A screw is a fastener.
What is an example of static friction?
Static friction is the friction the object must be able to overcome in order to move. I'm sure you've noticed that you have to work hard to get an object to move, but once its moving, it is easier to push it. That is because static friction is greater that kinetic friction.
