Question

In 1 to 2 sentences, Explain how a decrease in the resistance caused by friction change the amount of force needed to move an object?

Answer 1

Whenever two objects rub against each other, they cause friction. Friction works against the motion and acts in the opposite direction.

Using newton's second law we can describe a generic case of movement:

`\begin{gathered} \Sigma F=ma \\ \Sigma F=F-Ff \end{gathered}`

Where:

F = Amount of force need to move an object

Ff = Friction force

As we can see, if:

`\begin{gathered} Ff\rightarrow0 \\ \Sigma F\rightarrow F \end{gathered}`

In another words, The smaller the friction force, the smaller the opposition to motion.