Motion & Pressure - Glossary
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What is acceleration?
The amount by which speed increases in one second
What is atmospheric pressure?
Pressure caused by collisions of air molecules
What is the centre of gravity?
The point in an object where the force of gravity seems to act
What is centre of mass?
The point in an object where the mass of an object seems to act
What is density?
The mass of a material in a certain volume
What is gas pressure?
The force exerted by air particles when they collide with a surface
What is liquid pressure?
The pressure produced by collisions of particles in a liquid
What is moment?
The measure of the ability of a force to rotate an object about a pivot
What a pivot?
The point about which a lever or see-saw balances