Algae are green plants. The figure below shows the number of algae in a lake in the United Kingdom during
one year
number of
algae
Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec
month
Explain the changes in the number of algae in the lake from February to June (3)

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on

Yes yes yes very good

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