just analyze it in this way:
20cos30*=10( radical 3 )
20sin30*=10
Answer:
The pole stores elastic potential energy when the pole is bent because its shape is change from its natural shape and it will want to go back to its original form, just like a spring or stretched elastic material.
Question:
Why did you lie about being in college?
The distance quantity/ measurement must be squared.
B) It’s material moves due to convection currents.