## 4 Results and Discussion
### Measurement Results with SUV  
The measured values of SUV are given in Table 7. The values are given without the weight of the beams with pallets. Since the key aim in relation to SUV was also to determine the center of gravity's height, the values of weight corresponding to the front axle when it is lifted are given as well. The weight applied to the rear axle changed from 580 kg with the empty vehicle up to 1029.5 kg with the load placed in the luggage compartment and on the lowered rear seats (Table 7). Based on data from Table 7, there is a presumption of the highest center of gravity with the load in the roof box only, since it led to the reduction of load of the front axle when lifted. At the same time, when the center of gravity is high, the front axle loses its ability to shift forces onto the road while driving uphill to a large extent since it leads to a reduction in load, which is a very important characteristic for an SUV [88]. The relation between the vehicle's ability to drive uphill and the position of its center of gravity is described in the publication [89] in which the authors mention a high value of correlation. To verify the measurement accuracy, the measurement deviations from the weight measured by separate weighing of the empty vehicle with the driver and separate weighing of the load are given in Table 8. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Variant** & **Front Axle (kg)** & **Rear Axle (kg)** & **Lifted Front Axle (kg)** \\ \hline Empty vehicle & 911.0 & 582.0 & 873.5 \\ Load in the roof box only, 72 kg & 927.0 & 638.5 & 682.5 \\ Load in the luggage compartment, on the lowered rear seats, 400 kg, on the floor & 927.0 & 638.5 & 883.0 \\ in front of the lowered rear seats, and on the floor in front & & & \\ of the front seat, 72.5 kg & & & \\ Load in the load compartment, on the lowered rear seats, & 942.0 & 1029.5 & 882.0 \\
400 kg, and in the roof box, & & & \\
72.5 kg & & & \\ Load on the floor, 72.5 kg & 943.0 & 623.5 & 905.0 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Measured values of SUV. Figure 7: Position of the center of gravity of hatchback. Weighing with a weight scale pallet truck was with minimum deviations (Table 8). The deviations could have been caused by a different position of the driver on the seat, or the height of the front and rear axles from the floor were not the same [90; 91]. Similarly, low values of differences between the mass determined by weighing the vehicle with a load and the mass determined by an addition of the mass of the vehicle and the load are also given in Table 4. The maximum difference was 7 kg, which is 0.50%. In Tables 3 and 8, the average difference was 1.7 kg, which is 0.10%. Therefore, the method of determining the vehicle mass by using the weight scale pallet truck and the pallets can be regarded as accurate and reliable enough. For a comparison, in publication [58], the difference between the vehicle mass determined by weighing (1200 kg) and the vehicle mass determined by calculation (1112.7 kg) was up to 7.3%. The authors also mentioned the result of 1283 kg when using another method, so it can be concluded that for determining the vehicle mass and subsequent calculation of the center of gravity's position, weighing by the weight scale pallet truck is a very suitable method. The percentage division of the mass into the front and rear axles and the distances of the center of gravity from the front and rear axles, calculated according to Formulas (1) and (2) are given in Table 9. The percentage division of vehicle mass into the front and rear axle is given in the second and third columns. The fourth column shows the change in mass distribution in comparison with the empty vehicle, given in percentages. The distance of the center of gravity from the front and rear axle is given in the fifth and sixth columns, and the last column shows the change in the center of gravity's position in the horizontal direction in comparison with the empty vehicle, and it is given in meters.