How to Calculate the Acceleration(a) of an Object Sliding an Inclined Plane.

An object placed on an inclined plane of a certain angle theta experiences the following effect: its weight acting downward, a fictional force pulling it in the opposite direction to its motion, and normal reaction acting upwardly
The effective component of the force is F=mgSin∆ as the object slides down the inclined plane. The acceleration of the object can be calculated by estimating the resultant force(Fr) and the mass(m) of the object. Therefore, details are given regarding the following relations:
F = mgSin∆ ......1
f = ma.................2
a = F/m................3.etc