1. **Stating the problem:** We have points A, B, C, and D on a school land plot with given distances and angles. We need to find the required gravitational force (or weight) and related measurements involving segments AB, AC, and BD. 2. **Understanding the given data:** - Angle at B between points C and A is given as $\angle CBA = 38^\circ$. - Length of segment AC is approximately 4 m. - Segment BDA is about 7 m. 3. **Step 1: Calculate the length AB using the Law of Cosines or trigonometric relations if needed.** Since $\angle CBA = 38^\circ$ and AC = 4 m, if we consider triangle ABC, we can use the Law of Cosines or Sine Rule depending on other known sides or angles. 4. **Step 2: Calculate gravitational force or weight (if mass or density is given).** Since the problem mentions "Guruthma pojerya" (gravitational force), if mass $m$ and gravitational acceleration $g$ are known, then weight $W = mg$. 5. **Step 3: Calculate the distance or force related to BD and D points.** Given BDA length is 7 m, we can analyze triangle BDA for further calculations. 6. **Summary:** - Without explicit mass or force values, we can only calculate distances and angles. - Using trigonometry, calculate unknown sides or angles. Since the problem lacks explicit numerical values for mass or forces, the main calculation is geometric. **Example calculation for AB using Law of Cosines:** $$AB = \sqrt{AC^2 + BC^2 - 2 \times AC \times BC \times \cos(\angle CBA)}$$ If BC or other sides are unknown, more data is needed. **Final answer:** Due to incomplete numerical data, the problem requires additional information to compute exact gravitational forces or distances.