Answer:
The two factors are:
• The kind/type of surface involved.
• The force that the surface are being pushed together.
Explanation:
Friction can be said to be the general term used to describe the force that one surface exert on another when they rub against each other.
When the surface is partially not smooth or totally rough, a greater force is been needed to move one surface past the other.
The weight of the can also significantly be a key factor. This is where the need to friction reduction come to play a role; and need for friction reducers like lubricant, rollers etc helps.
Our youth is exposed to cigarettes, vape pens etc and that whole industry trying to target the youth even make them flavorful to be more appealing to the youth
I don’t know if this is a question but yes a controlled experiment allows you to isolate and test the hypothesis
