1Density
The mass per unit volume of a substance.
2Pressure
Force per unit area.
3Archimedes' Principle
states that when an object is partially
or completely immersed in a fluid, it experiences an upthrust which is equal to the weight of fluid displaced.
4The law of flotation
states that the weight of a floating
body is equal to the weight of the fluid it displaces.
5Boyles Law
states that at constant temperature the volume of a fixed mass of gas is inversely proportional to its pressure.
6Newton's Law of Universal Gravitation
states that the force between two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance between them.
7Moment of a Force (Torque)
Force × Perpendicular Distance
**Check Papers**
8Conditions for Equilibrium
• The vector sum of the forces in any direction is zero.
• The sum of the moments about any point is zero.
9The Centre of Gravity
The Centre of Gravity of an object is the point through which all the weight appears to act.
10Lever
A rigid body which is free to rotate about a fixed point called a fulcrum
11Couple
Two parallel forces with the same magnitude acting in opposite
directions