Mechanics - Mass,
Weight, Density and Volume
Mass is the amount of matter
in an object or substance. Weight is the amount of gravitational force
acting on an object. Density is the amount of matter per unit volume
of an object. Volume is the amount of space occupied by an object or
substances.
Matter can be solid liquid an gases.
Substances
above referred to mainly liquid and gas.
Mechanics - Kinematics
A
study of mainly distance, displacement, speed, velocity, acceleration.
Distance is a scalar quantity in which the length an object traveled.
Displacement is a vector quantity in which the length and the
direction between the starting and the ending point. Speed is a
scalar quantity of which distance traveled by an object per unit time.
Velocity is a vector quantity of which the displacement traveled by an
object per unit time. Acceleration is the rate of change of velocity
per unit time.
There are 4 important graphs that all
learners need to know...
- Distance-Time Graph
- Displacement-Time Graph
- Speed-Time Graph
- Velocity-Time Graph
Mechanics - Force,
Vector and Scalar Quantities
Force = Mass X Acceleration
Vector
quantity specifies both the magnitude and direction of a measurement
whereas scalar quantity specifies only the magnitude of a
measurement.
Mechanics - Work, Energy and
Power
Work is the amount of force acting on an object over the distance
traveled by the object. Energy is the amount of work done per unit
time. Power is the amount energy exerted on an object per unit
time.
Mechanics - Principles of Moments
Moment is a vector quantity that represents the magnitude of force
applied to a rotational system at a distance from the axis of
rotation.
Mechanics - Pressure
Pressure is the amount of force acting per unit area. This mainly
cover pressure in solid and liquid. There will also be discussions on
Barometer and manometer.