Question

1) FRICTIONAL FORCE ALWAYS REDUCE ....................
2)Millions of years ago, the earth consisted of dense forests. When the plants and animals died, they got
covered by sand and mud and slowly decayed to form ..............
3)Which gases protects us from harmful rays

Answer 1

1)It always decreases the relative motion between two bodies or surface.

2)Fossil fuels

3)Nitrogen and oxygen protects us from the UV-215 and more energetic radiations.

I hope it will help you!!

Answer 2

Frictional force always decreases the relative motion.

2)Fossil fuels

3)Nitrogen and oxygen protect us from UV-215.