Respuesta :

Answer:

[tex]1. \: friction \\ 2.total \: energy = kinetic \: energy + potential \: energy[/tex]

Explanation:

[tex]♨Rage♨[/tex]

Nyzy

Question 8: Answer is Friction

Because 2 things are in CONTACT with each other. Contact is a big keyword.

Question 9: Answer is Kinetic energy + Potential energy

Because when you put those 2 together you make total energy