Question

if the angle btw the incline and horizontal surface is increased what will happen the magnitude of force needed to hold the object at rest on the incline

Answer 1

The force needed will be greater to hold the object at rest.

Step-by-step explanation:

For a better understanding let's take a look at the attached image.

In the image there is an example of this condition, we have an object of 3 kg-f mass, the first angle between the horizontal and the inclined plane is 35°. When we increase the angle to 45°. We can realize that we need to hold the object with a stronger force.

The calculation and the equations based on Newton's laws can be found in the attached image.