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Rev. Notes > IGCSE > Mass and Weight
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Spring balance Weight
Gravitational Acceleration Difference between mass and 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 / sto 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 / s2.


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View Comments on this Chapter - Total Comments (5)
Mr Manhating Said :
@Gowri, it does not say pluto is a plant if the table was about planets the moon and the sun would not be on it.
  18/05/14 09:56 PM
Gowri Said :
you have to be up to date on info. pluto , a planet? seriousle? and please give more details for each topic. thnx in advance
  27/02/13 08:00 PM
zaid Said :
give some examples>>>>
------------------------------------------------------------------------------------- Admin Replied:

Thank you very mych for your concern. Very soon, few examples will be added.

  22/01/12 07:11 PM
justinbeberhater Said :
muhammad,ur the one with the spelling mistaaked,idiot. its complete
  01/01/12 05:11 PM
muhammad ali akram Said :
the notes are easier and utterly comlete but, many spelling mistakes
------------------------------------------------------------------------------------- Admin Replied:

Thank You Mr Muhammed, We are trying our best to make sure all the spelling mistakes and grammer is edited in best possible manner.

  07/03/11 11:38 AM


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