Question

When an object's velocity is changing, the forces must be...When an object's velocity is changing, the forces must be...

Answer 1

We need the relationship between force and velocity

There are two ways

• Go through acceleration process (Apply Newton's law)
• Go through the momentum process(Quite difficult)

Let me use the second way

`\\ \sf\longmapsto p=mv`

`\\ \sf\longmapsto p\propto v`

According to Newton's second law

`\\ \sf\longmapsto F=(dp)/(dt)`

`\\ \sf\longmapsto F\propto p`

Now

`\\ \sf\longmapsto F\propto v`

• When velocity is more force must be more and vice-versa.

Key words:-

• Momentum=p
• Mass=m
• Velocity=v
• Force=F