The answer is a. yo-yo dieting
The frictional force acts upwards, so as to oppose the downward force of gravity. The reason that pressing against the wall harder makes the book stick more is because the reaction force from the wall increases and frictional force is directly proportional to reaction force.
Answer:
counter question if you get out the shower clean then how does your towel get dirty?
Answer:
The answer is hydrogen and oxygen
Explanation:
Answer:
both
Explanation:
because science is not included in both of them