Rev. Notes > IGCSE > Mass and Weight  
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Mass  Spring balance  Weight 
Gravitational Acceleration  Difference between mass and weight 
Weight 

Weight is the force of gravity on the object. It is measured in Newtons (N). The weight of object depends upon its mass and the gravitational field strength (gravitational acceleration). Any mass near the surface of earth has weight due to the earth's gravitational pull. Weight can be calculated using the equation Weight = mass (m) X gravotational field strength (g) w = mg The value of the gravitational field strength on earth is 9.81 N/kg, through we roound it up to 10 N/kg or 10 m / s^{2 }to make the calculations easier. Gravitational field is the region arround earth for any body, in which object enters will get the force of atarction towards the center of earth. If you will stand on the moon, you will feel the gravity of the moon pulling you downward towards the center of the earth. The gravitational field strengh on the moon is very less as compared to the earth. On the moon gravitational field strength is 1.6 N / kg or 1.6 m / s^{2}.




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