Answer:

12.2 because the part of the rod became rough

13-14. 2 more friction slow down moving objects

3 less friction increases thespeed of moving object

15.3 there is friction the floor that makes it hard to push the tables and chairs

16.4 sanpaper

17.4 on a hill covered with small grasses

18.3rough soles

19.3 over a smooth surface

Answer:

HI KUYA WAG NIYO KO REPORT HA