Answer:
hi, the reason is for friction so that they don't fall. subscribe to me on you tube. name is my brainly name
Explanation:
That's ONLY true when the pendulum is hanging
in the center position and not moving.
Answer:
it comes from your knowledge and the information you have to get the reason why that is the answer so you are putting together things that you already know what the new information you have
The hardness
nail or fingernail