A series of free GCSE/IGCSE Physics Notes and Lessons.
The following diagram gives the formula for weight, mass and gravitational field strength (gravity).

Gravity and Weight
What is meant by gravity and weight?
Explore the difference between mass and weight.
How to calculate weight using mass and gravitational field strength?
Explore how the weight of an object depends on its location.
Mass vs Weight, Force of Gravity, Gravitational Acceleration
What is the difference between mass and weight?
How to calculate the force of gravity acting on an object given its mass?
How to calculate the gravitational acceleration given the mass and weight force?
Examples and practice problems.
Try out our new and fun Fraction Concoction Game.
Add and subtract fractions to make exciting fraction concoctions following a recipe.
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