"1. Throw a ball made of your desired material onto the field.
2. Conduct the friction experiment 3 times for each material.
3. Test a ball made of an unknown material, then identify the correct material based on the friction angle measurements.
4. Select the correct answer."
| comfort | ⦾ Comfortable |
| age rating | 0+ Everyone |
| storage | 0.3 GB |
| website | training.contentsda.kr |
| developer | ContentsDaInc |
| publisher | ContentsDA Inc. |
| connection | Internet not required |
| app version | 1.0 |
| languages |
English
|