Loading and unloading in retail transportation is affected by several factors, including:
1. Time efficiency: The quicker the process, the better it is for maintaining schedules and reducing costs.
2. Labor efficiency: The number of workers required and their skill level can influence the speed and safety of loading/unloading.
3. Safety: Ensuring that goods are safely handled and that no injuries occur during the process.
4. Cost: Efficient handling of goods can reduce transportation costs and prevent damage to goods.
| Case No. | Lens | Focal Length | Object Distance |
|---|---|---|---|
| 1 | \(A\) | 50 cm | 25 cm |
| 2 | B | 20 cm | 60 cm |
| 3 | C | 15 cm | 30 cm |