Question

How fast will an object with a mass of `7 kg` accelerate if a force of `9 N` is constantly applied to it?

Answer 1

The acceleration is approximately `1,2857 m/s^2`

Explanation:

In this situation, we can use Newton's second law of motion, which states that force applied to an object is equal to mass times acceleration:

`F=m*a`

`N=kg*m/s^2`

The given elements are the mass of the object and the force that is applied:

`F=9 N=9 kg*m/s^2`

`M=7 kg`

Now we can set our equation the way we need it:

`a=F/m`

`a=9 kg*m/s^2/7 kg`

`a~~1,2857 m/s^2`

For a more illustrated explanation about Newton's laws you can check this:
http://teachertech.rice.edu/Participants/louviere/Newton/law2.html