Skip to main content

More for You

How does Messi keep the ball close to himself

Your friend
The science of how Messi keeps the ball close to himself photo credit: ZaleDesigns Messi is a magician with the ball at his feet. He's in my opinion the best player in the sense that he can control the ball so well, runs so fast with the ball & changes the direction at full speed like it's a walk in the park. For starters he started playing very early (at 3) which is crucial if you want to be a good player. In that aspect, he's God gifted as he had dribble skills which is genetic in my opinion. Height He is short which means a low center of gravity so it's difficult to push him off the ball. That's why we see that anyone rarely can topple him down, instead players much larger than him lose possession to him. So his short height suits his style of play & is a blessing in disguise. Change of pace Messi changes his pace really well. He starts slow and runs directly at the defender which means the defender has to stop & focus on him. When he reac...
1 comment

what is friction?

Image
Your friend

Physics - Friction

Introduction

  • Friction is result of the irregularities on the two surfaces in contact of each other.

Friction

  • The force of friction is dependent on the irregularities of the surface; if it is greater, then the friction will be greater and if it is smooth, then the friction will be lesser.

  • Effectively, the friction is result of the interlocking of irregularities in the two surfaces.

  • If the two surfaces (in contact) are pressed harder, then the force of friction will increase.

  • On a frictionless surface, if an object starts moving, it would not stop ever; Without friction, it is not possible to construct a building.

  • Friction produces heat; when a matchstick is rubbed against the rough surface, it catches fire.

Matchstick

Substances Reducing Friction

  • The substances that reduce friction are known as lubricants. E.g. when oil, grease, or graphite is applied between the moving part of a machine, then it creates a thin layer; resultantly, moving surfaces do not directly rub against each other that ultimately reduces friction.

  • When a body rolls over the surface of another body, the resistance to its motion is known as the rolling friction. The rolling reduces the force of friction.

Rolling Friction

  • The frictional force exerted by fluids is known as drag.

  • The frictional force, on an object in a fluid, is dependent on its speed with respect to the fluid.

  • The frictional force depends on the shape of the respective object and also on the nature of the fluid.

  • Fluid friction is minimized by giving suitable shapes to the bodies moving in fluids.

Labels:

Comments

Post a Comment

RECENTS

what are the branches of biology

Your friend
 Branches of Biology branches of biology The following table illustrates the different branches of biology with their brief description − Branch Studies Anatomy Study of the internal structure of an organism Aerobiology Study of airborne microorganisms Agronomy Study of soil management and crop production Agrostology Study of grasses Araneology Study of spiders Actinobiology Study of the effects of radiation upon living organisms Angiology Study of the diseases of the circulatory system and of the lymphatic system Bioinformatics of collecting and analyzing complex biological data including genetic codes through computer technology Biotechnology Use of cellular and biomolecular processes to develop technologies and products, which ultimately help to improve human lives and the health of the planet. Biochemistry Study of chemical and physio-chemical processes and substances, which occur within the living organisms. Batrachology Study of amphibians including frogs and toads Bioclimato...
1 comment
continue reading »

why do we fall sick?

Your friend
Biology - Why do We Fall Ill Introduction Health means a state of mental, physical, and social well-being. The health of an organism largely depends on his/her surroundings or the environment. a sick man Major causes of poor health are - the garbage, which is thrown in an open area nearby residence or streets, or/and the open drain water lying stagnant around the residence area. The public cleanliness is the key of good health. Some diseases, last only for a short period of time, are known as  acute diseases . E.g. cold, fever, etc. The diseases that last for a long period of time, even as much as a lifetime, are known as  chronic diseases . E.g. asthma, osteoporosis, etc. Chronic diseases, normally, have very severe long-term effects on people’s health as compared to the acute diseases. Infectious Diseases When microbes are the immediate causes of a disease, it is known as  infectious diseases . Some of the major agents of infectious diseases are viruses, bacteria, fungi...
Post a Comment
continue reading »