Dimensions & Motion
Dimensions & Motion
Dimension: Dimension is the measurement of an objects regards with its mass, length and time.
It is also defined as the coordinates which can define the size of object.
Dimensional Formula: Dimensional formula gives the powers of mass ,length and time which are raised to attain the unit of any physical quantity.
Here I am describing dimensional formulas of few common and important physical quantities which are used in general terms.
Rest:An object is said to be at rest when it remains in the same position . When the object does not changes its position it is called to be at rest.
Example: Stone on the hill
Motion:An object is said to be in motion when it covers some distance or when an object changes its postion with time it is called in motion.
Example:moving car, Running ball.
Types of motion:
One Dimensional Motion:When an object moves in one direction only or when in the x-axis .The motion is said to be one dimensional. Example: running train
Two Dimensional Motion: When an object moves in two directions or we can say that when an object moves in x-axis and in y-axis simultaneously it said to be two dimensional motion.
Three Dimensional Motion: When an object moves in three axis or in space it is called three dimensional motion.
Example: Motion of aeroplane.
Uniform Motion: When an object moves equal distances in equal intervals of time it is called uniform motion . For example: Take an object which covers 5 meters in 10 seconds . Then in next 5 seconds it again covers 5 meters of distance then again n again .This is called uniform motion.
Non Uniform Motion: When an object covers equal distance in unequal interval of time or unequal distance in equal intervals of time .It is called non-uniform motion.For example: Take an object which covers 10 meters in 7 seconds and next 10 meters in 12 seconds .this is non uniform motion.
Velocity: Velocity is the ratio of displacement with time or it is also defined as the rate of change of displacement is called velocity
Displacement is same as the distance but the difference is that displacement is the shortect distance in a particular direction.
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