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gcse_forces_massweight [2017/11/05 20:41] (current)
rheadi created
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 +====== Mass and Weight ======
 +
 +  * Mass is how much of you there is.  It is measured in kg and is a scalar.  It does not change from place to place.
 +  * Weight is how hard the force of gravity pulls on you.  It is measured in N (it is a force!) and is a vector.  It does change from place to place.
 +
 +===== Why do we have weight? =====
 +
 +{{ :jennishillmwg.jpg?nolink|}}
 +  * The force of gravity pulls you towards the centre of the Earth.  
 +  * On Earth, the gravitational field strength is 10 N/kg.
 +  * This means that for every kg of mass you have, 10 N of force is pulling you towards the centre of the Earth…
 +  * On the Moon the gravitational field strength is only 1.6 N/kg.  The same mass has less weight on the moon than it does on Earth.
 +  * In space there is no gravity.  You are weightless!
 +
 +===== Factors affecting weight =====
 +
 +Your weight is bigger if:
 +
 +  * You have more mass
 +  * You are in a stronger gravitational field.
 +
 +{{ :wmg_triangle.jpg?nolink|}}===== The formula! =====
 +
 +  * Weight = mass x gravitational field strength
 +  * Mass = weight divided by gravitational field strength
 +  * Gravitational field strength = weight divided by mass
 +
 +
 +
 +
 +
  
gcse_forces_massweight.txt · Last modified: 2017/11/05 20:41 by rheadi