These are my answers they might not all be right.
1. Motion
2. Speed
3. 2nd
4. Reaction
5. Linear
6. Force
7. Clockwise
8. True
9. False
10. Both linear and rotary
Hopefully they are all correct !
Answer:
well you need to ask your teacher
Explanation:
You should comfort him, and ask him what's wrong. Treat him like any other person and try to find a solution to his problem. Be there for him so it makes him happy again :)