In the context of a graph plotting the force exerted by the motors (on the y-axis) against the acceleration of the motorboats (on the x-axis), according to Newton's second law of motion (F = ma), the relationship can be expressed as:
\[ F = ma \]
When plotted, this linear equation shows that:
- The slope of the graph represents the mass (m).
- If we rearrange the equation, it does not include a constant term; hence, when acceleration (a) is zero, force (F) is also zero.
Since there is no additional constant term in this linear relationship, the y-intercept of this graph will be:
zero
So the correct response is:
zero.