ساينس الصف الأول الاعدادي – الفصل الدراسي الاول ساينس اولي اعدادي ترم اول In This part we will study : 1. The meaning of energy Work : When a force acts on a body to move a distance (displacement) in the same direction of such force, it is said that work is done on such object. – Work can be determined from the following relation Work (W) = Force (F) x Displacement (d) (Joule) (Newton) (Metre) Problem: Calculate the work done by a fireman to lift a force of 65 newton in a distance of 10 meters height. Solution W = F x d = 65 x 10 = 650 joules Energy It is the ability to do work or to make a change. لمتابعة مستر احمد الباشا وكل ما يخص الساينس : جروب الفيس بوك http://bit.ly/2Of1mcN صفحة الفيس بوك http://bit.ly/2Gq5xMo بالتوفيق مستر احمد الباشا