What Force would be needed to extend a spring with a spring constant k=7 N/m that extends

0.3m?

Force = - 2.1 Newton

Step-by-step explanation:

According to question,

The value of Spring constant, K = 7 N/m Newton per meter

And the spring is extended up to 0.3 meter

The Force experience on the spring is calculated from the Hook's Law

The principal state that, the force applied on spring to extend or compress the spring to some distance is proportion to that distance.

Let the force be F

So, F = - K X

where K is spring constant and X is its displacement

Negative sign shows displacement of spring once it is stretched

And K is spring constant

So, Force = (-) 7 * 0.3

I. e Force = - 2.1 Newton Answer