Question

multiple choice question
a ball rolls down a straight incline ramp, increasing its speed along the way. at what position is the net force the greatest?
the bottom
the top
the middle
everywhere

Explanation:

For a ball rolling down a straight incline, the net force comes from the component of gravity parallel to the ramp minus rolling friction (assumed constant here, or negligible for a simple ramp). Since the ramp's slope is uniform, the gravitational component $mg\sin\theta$ (where $m$ is mass, $g$ is gravitational acceleration, $\theta$ is ramp angle) is the same at all positions. There is no change in the net force along the straight incline.

Answer:

Everywhere