A body is sliding down an inclined plane having coefficient of friction 0.5. If the normal reaction is twice that of resultant downward force along the inclined plane, then find the angle between the inclined plane and the horizontal .

Explanation

To solve the problem step by step, we will analyze the forces acting on the body sliding down the inclined plane and use the information given to find the angle of inclination (θ).

### Step 1: Identify the Forces Acting on the Body
When a body is on an inclined plane, the forces acting on it include:
- The gravitational force (mg) acting vertically downward.
- The normal force (N) acting perpendicular to the inclined plane.
- The frictional force (f) acting parallel to the inclined plane, opposing the motion.

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