Physical quantities The physical quantity is any quantity that can be determined and has a unit of measurement in our life , each physical quantity is measured in a special measurement unit , such...
The motion The motion is the change of the object’s position ( location ) as the time passes according to the location of another object , The motion happens all around us , We...
The scientists have discovered that the atom stores a massive amount of energy inside the nucleus, and it is accompanied with forces known as the nuclear forces which can be divided into the weak...
The weight The reason of object’s falling downward the Earth is a type of force called the weight (the gravitational force), and you can feel this force when you carry an object or try...
The properties of the mass The mass is the amount of the matter in an object, the mass of any matter is a fixed value, It does not change by changing the state of...
The force The force is the effect that changes the state of the object, the measuring unit of the force is “Newton” related to the scientist “Isaac Newton”, the motion of any object and...
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