Weight, Mass and Gravity Flashcards
What is gravitation force?
The force of attraction between all masses.
Gravity attracts…
All masses.
Anything near a planet or star is what?
Attracted to it very strongly.
What happens on the surface of a planet?
It makes everything accelerate towards the ground.
On the surface of a planet it makes everything accelerate to the surface of the ground, with all the same what?
Acceleration.
10 m/s2 on earth.
On the surface of a planet it gives everything a…
Weight.
Weight and mass are not what?
The same.
What is mass?
The amount of ‘stuff’ in an object.
For any object this will have the same…
Value anywhere in the universe.
What is weight caused by?
Pull of gravitational force.
The weight of an object is what?
The force of gravity pulling it towards the centre of the earth.
Where does the object have the same mass?
Earth.
Moon.
What will be different on the earth and the moon?
Objects weight.
Why do objects weigh less on the moon that on earth?
Gravitational force pulling on it is less.
Weight is ____ measured in _____.
Force.
Newtons.
What is weight measured using in?
Spring balance.
Newton meter.
Mass is not…
Force.
What is mass measured in?
What with?
Kilograms.
Mass balance.
What is a mass balance?
Old-fashioned pair of balancing scales.
What is the equation for weight?
W = m x g.
Mass x gravitational field strength = weight.
Acceleration due to gravity and gravitational field strength are what?
The same value, no matter what.
G =
Strength of the gravity.
G is different for…
Different planets.
On Earth what is g?
10 N/kg.
On the moon what is g?
About 1.6 N/kg.
