Quantities and Unit

Quantities is anything that can be measured and expressed numerically. The units are complementary description of magnitude in order to compare the results. Example : the table length is 100 cm, then the "long table" is quantities, "100" is a value, and "cm" is a unit.

In physics, there are 2 quantities : base and derived quantities. There are only 7 base quantities and many derived quantities. Both are often used in physics and everyday life.

The above table shows the base quantities along with the unit and symbol

Parabolic motion

Parabolic motion is one of the special motion in our lives.  This motion is a motion blend Straight Regular (GLB) in the direction of the x axis and the vertical motion upwards towards the y-axis . GLB mean speed is always fixed / not changeable . Upward vertical motion means that the speed can be changed any time


Parabolic motion is used by the bombers to attack enemy soldiers with a certain distance . Bombers or aid can also specify the target by studying the motion of a satellite dish . The football and basketball athletes can also use a parabolic move the ball to reach the target . Javelin thrower and a hammer thrower also tried to throw the parabolic motion . Parabolic motion of objects believed to be able to deliver more than just a horizontal motion