Question

Which of the following best describes Newton's Second Law of Motion? (more than one answer applies)

F=m • a

A swimmer turns and kicks off from the end of the pool.

A book will slide across the desk if you exert a force on it.

An object in motion will remain in motion in the same direction and at a constant speed unless another force acts on it.

Law of inertia

Shows the relationship between mass, force and acceleration.

For every action there is an equal and opposite reaction.

When a hammer strikes a nail, the nail exerts a force back on the hammer.

Answer 1

I need this answer too.

Answer 2

F=m • a

A swimmer turns and kicks off from the end of the pool.

A book will slide across the desk if you exert a force on it.

Step-by-step explanation:

The first one, F = ma is a direct expression of the Newton's second law of motion. This is because the force exerted on an object changes its momentum like this:

`F= M(dv)/(dt)`

where
`(dv)/(dt) = a` (acceleration is change in velocity with respect to time)

Thus, the equation will be in the form:

F = ma

The second scenario points to an acceleration produced as a result of the force on an object. This time the feet propel the motion hence,
`(F)/(m) = a`

The third scenario is the fact that the force produces acceleration on the book.