شرح رياضيات لغات للثانوية العامة - ديناميكا -القانون الاول للنيوتن منهج جديد 2017

Explain mathematics languages General secondary - dynamics - the first law of Newton

Explain mathematics languages General secondary - dynamics - the first law of Newton

types of forces 

1- nuclear

2-magnetic

3-electrical

4- cravitional

5-mechanics

Every body preserves in state of rest or of moving uniformly unless acted upon by an balanced external force by external effect