1.What is friction?
Answer:Friction is a type of force between 2 surfaces that are moving against each other.It works in the opposite direction of the object that is trying to move, friction usually slows an object that is moving.
2.What is air resistance?How is it related to friction?
Answer:Air resistance is when an object is moves through air.The friction assists in slowing down the object. Air resistance is also a type of friction.
3.Moving objects experience several forces,including friction.How, and why, does a moving object experience forces as it interacts with a surface?
Answer:A moving object experiences forces by slowing down,getting faster or moving to another place and the reason it happens is because when an object experiences forces of pull
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Hard surfaces, like concrete, develop a greater impact than soft surfaces,like grass.Athletes wear shoes to absorb the shock from the impact and to assist them in running long distances without injuring the bones and joints. Shock-absorbing shoes help minimise the chance of getting injured.
6.What are some ways by which we can minimise the force of friction between two surfaces?
Answer:1.exchange sliding motion with a rolling motion instead
2.Use a lubricant (solid/liquid) which will produce a thin layer between the surfaces.e.g oil
3. You can reduce air- resistance by making the object streamlined
4.Change the types of object slinging against each other.
7.What are blisters on the skin?
Answer:A blister is a small pocket of fluid found on the outer skin layers.Majority of blisters are formed from skin being damaged by friction/heat.
8.How does the body produce a blister?
Answer:The destroyed outer layer of skin tears away from the layers beneath and fluid accumulates in the space which creates a
In order to begin their outdoor adventure, a skier must first face the forces of static friction. Static friction is the force that keeps the skier at rest. As the skier overcomes the static friction there is a point where the coefficient of friction is greater than that of the kinetic friction that resists the skiers motion. It is clear to see this concept in the figure below.
An object that is falling through the atmosphere is subjected to two external forces. The first force is the gravitational force, expressed as the weight of the object. The weight equation which is weight (W) = mass (M) x gravitational acceleration (A) which is 9.8 meters per square second on the surface of the earth. The gravitational acceleration decreases with the square of the distance from the center of the earth. If the object were falling in a vacuum, this would be the only force acting on the object. But in the atmosphere, the motion of a falling object is opposed by the air resistance or drag. The drag equation tells us that drag is equal to a coefficient times one half the air density (R) times the velocity (V) squared times a reference area on which the drag coefficient is based.
Air resistance is a form of friction (namely fluid friction) a friction from the air, as we know friction is defined as a force that opposes movement.
The labs 4.1, 4.2, and 4.3 demonstrates how weight, mass, and surface area affect the amount of friction on an object. In lab 4.1, there were five different sliding surfaces that were tested. The surfaces tested were tabletop, Waxed paper, paper towel, fine sandpaper, and coarse sandpaper. Each of the surfaces had four of the same blocks that was attached to a spring scale to the blocks and drug one at a time across the surface. For 4.2, the graph showed a comparison between two surface type averages. For 4.3, the surface frictions were weighed with a spring scale.
Lift is an aerodynamic force perpendicular to the air flow. Drag is an aerodynamic force the acts as a parallel to the direction of the wind flows or against the flow of movement of the object. Thrust is the force that moves an object forward or the opposite of the force of drag. Gravity is the force of which keeps objects from floating to oblivion and beyond. The two primary aerodynamics forces are drag and lift. Drag is an aerodynamic force the acts as a parallel to the direction of the wind flows or against the flow of movement of the object. Lift is an aerodynamic force perpendicular to the air flow. As air moves underneath and toward an object, lift can drive an object, lift drives the object upwards and drag is the complete opposite, it acts as a parallel to the direction of the flow of wind and pushes against the wind. The opposite of the drag is the forward force of thrust. The account of weight is created by the force of the gravity pulling any and all objects towards the earth. The fundamentals of aerodynamics are the principles of drag, lift, gravity, thrust, and weight which is created by
Forces play two fundamental roles: to cause an object to move or to change shape (Lawler, 2018). Although there are a variety of forces to study- from inertial forces to gravitational ones- they all utilize at least one of those functions. Impact forces are no exception. Impact forces are those that involve a collision between two objects (Lawler, 2018). Impulse is a concept in physics that is governed by these ever-present forces. Impulse is the product of force and time that equals to the amount of change that the product of mass and velocity (momentum) undergo (Lawler, 2018). Human movement incorporates force in two ways: by maintaining static equilibrium- that is resisting the force of weight- and by generating acceleration, which is essentially a change in momentum (Schilling et al., 2008). Pressure,
An object at rest tends to stay at rest and an object in motion tends
Shoes are not only worn to protect the human feet. They are also worn because they add the final touch to the style you are trying to create. The history of shoes is very long and nobody really knows when the first shoes were created but we do know that they were originally made to warm the feet. Now, there are many different types and each kind helps you function a different way. The shoe is also made up of many parts and every kind of shoe has different parts then other types. Year by year, shoes have been improving and becoming more and more popular. Now, we have all the equipment and all the materials we need to make the shoe better than ever.
Force is a push or a pull, which can make an object start moving when
Athletic shoes are worn by many people of different sex, age, and size. Athletic shoes are something that is very comfortable to wear and have give people’s feet the right support. Athletic shoes also help people perform different activities better and at ease, an example is running shoes. Running shoes help people perform the activity of running better. People who do sports such as track wear running shoes so that they can get the right boost from their feet when running and to be able to run for a long amount of time without their foot getting a cramp or their soles not cooperating well with the track. Football and baseball players wear athletic shoes called cleats so that they can get the right amount of traction on the field when their running so that they don’t slip and fall on the slippery
A bruise or “contusion” appears on the skin when it has suffered a cut or a blow to the area or other related trauma.
Sir Isaac Newton is the man well known for his discoveries around the term, Motion. He came up with three basic ideas, called Newton’s three laws of motion.
Aerodynamics, is a branch of Fluid dynamics concerned with studying the motion of air, particularly when it interacts with a solid object, such as an airplane wing. Aerodynamics is a sub-field of fluid dynamics and gas dynamics, and many aspects of aerodynamics theory are common to these fields. The term aerodynamics is often used synonymously with gas dynamics, with the difference being that "gas dynamics" applies to the study of the motion of all gases, not limited to air.