- 1 block
- 2 Weight
- 3 The difference between mass and weight
- 4 References
Can be defined mass as reluctance shown by the article towards the force that is trying to change its speed or direction, which is an essential characteristic of article,  such as length and time, and therefore its definition is difficult to specifically, it has been expressed by Isaac Newton as the amount of material, and it is measured in kilograms and love. 
Weight is the name of the force exerted by gravity on an object, and is equal to mass times the acceleration of gravity, note that the acceleration of gravity = 9.8 m 2 in the second,  any weight depends on the amount of gravitational pull of the body, so the body weight of the mass of 1 kg on Earth's surface is 9.8 Newton. 
The difference between mass and weight
The most obvious difference between mass and weight is that the mass remains constant with the move on the surface of the earth, as opposed to the weight change force is changing the Earth's gravity, which means that the body mass on the ground are the same on the moon, while the body weight on the ground is not equal weight on the moon, and this The table shows the most important differences between them: 
- ↑ "Mass", www.britannica.com, Retrieved 26-12-2017. Edited.
- ^ أ ب "Mass,Weight and, Density", www.physics.ucla.edu, Retrieved 26-12-2017. Edited.
- ↑ Todd Helmenstine (8-3-2017), "Definition of Weight"، www.thoughtco.com, Retrieved 26-12-2017. Edited.
- ↑ Anne Helmenstine (5-7-2017), "What Is the Difference Between Weight and Mass?"، www.thoughtco.com, Retrieved 26-12-2017. Edited.
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