Gravitational Force = force of attraction between all masses
2 important effects: - it makes all things accelerate towards the ground on surface of the Earth - gives everything weight
Weight and Mass are NOT the same thing:
Mass = amount of stuff in an object
Weight = caused by pull of gravitational force
An object has the same mass anywhere, BUT its weight will be different in other surroundings
The weight of the object depends on its gravitational force
Weight is a force measured in Newtons
Mass in NOT a force , measured in kg
On the Earth: gravitational field strength = 10N On the moon: gravitational field strength = 1.6N
W = m x g Weight, N = mass, kg x gravitational field strength
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