The acceleration of the block released at an inclination of angleθis
We know that in case of the absence of frictional force the acceleration of the object is calculated by using the net force that is parallel component of the force acting on the object.
N=mgsinθ
ma=mgsinθ
a=gsinθ
The net force is force acting in the parallel direction of the inclined plane is given as.
F=10×10sinθ
F=100sinθN
The perpendicular force and the normal will cancel out each other and the parallel forces and frictional force will be the force acting. Since it given that there is no frictional force. Hence the net force acting will be parallel only.