This next statement is a big deal. It should be up on a board, surrounded
by flashing red and yellow lights, and hung on the wall of every Science
classroom. Although we never see it in our daily lives, it's fundamental to
the workings of the universe, and it's also Newton's first law of motion:
<em>Without friction, it doesn't take <u>ANY</u> force to keep a moving object
moving. </em><em>Force is only required to <u>change</u> the object's speed, or to
<u>change</u> the direction </em><em>in which it's moving.</em>
The answer to the question is: On a level road, and neglecting any friction,
the engine doesn't have to supply ANY force to keep the car going at the
same speed.
A force that cannot produce equilibrium with these two forces must be less than 7 N or greater 7 N.
The given parameters;
- <em>3 Newton force </em>
- <em>4 Newton force</em>
A body is said to be in equilibrium state when the net force on the body is zero.
A force that produce equilibrium among two forces acting concurrently is known as equilibrant force. This force is usually equal to sum of the two concurrent forces.

where;
- F₁ and F₂ are the concurrent forces
- F₃ is the equilibrant force
From the given parameters;

Thus, a force that cannot produce equilibrium with these two forces must be less than 7 N or greater 7 N.
Learn more here:brainly.com/question/12582625