Chapter 0
Physics Basics
مقدمة إلى Scalers
Many familiar physical quantities can be specified completely by giving a single number and the appropriate unit. For example, "a class period lasts ...
ناقلات أو منتج متقاطع
Vector multiplication of two vectors yields a vector product, with the magnitude equal to the product of the individual vectors multiplied by the sine of ...
مقدمة في المتجهات
To define some physical quantities, there is a need to specify both magnitude as well as direction. For example, when the U.S. Coast Guard dispatches a ...
وحدات ومعايير القياس
A physical quantity is defined either by specifying its measurement method or by stating how it is calculated from other measurements. For example, ...
الدقة والدقة
Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy ...
قواعد الأرقام المهمة
In any measurement, the precision of the measuring tool is an essential factor. An ordinary ruler, for example, can measure length to the closest ...
الأخطاء العشوائية والمنهجية
Scientists always try their best to record measurements with the utmost accuracy and precision. However, sometimes errors do occur. These errors can be ...
الموقف والإزاحة
The position of an object defines its location relative to a convenient frame of reference at any particular time. A frame of reference is an arbitrary ...
نواقل الموضع والإزاحة
To describe the motion of an object, one should first be able to describe its position (where it is at any particular time). More precisely, the position ...
الكتلة والوزن
Mass and weight are often used interchangeably in everyday conversation. For example, medical records often show our weight in kilograms, but never ...
التسارع بسبب الجاذبية على الأرض
Newton's second law is closely related to his first law of motion. It mathematically gives the cause-and-effect relationship between force and changes ...
توتر
Tension is a force along the length of a medium, in particular, a force carried by a flexible medium, such as a rope or cable. The word "tension" ...
قوة الجاذبية
In the years before Newton, a general belief prevailed that different laws governed objects in the sky than objects on Earth. When Kepler wrote down the ...
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