Physics

To find the normal force acting on a 20 kg object on an inclined plane at a 30-degree angle, we can use the following steps:

 

1. Calculate the weight of the object:

where:

 

 

2. Resolve the weight into components:

The weight can be resolved into two components:

The component perpendicular to the incline (which contributes to the normal force):

 

The component parallel to the incline (which causes the object to slide down):

 

For a 30-degree incline: