Describe, qualitatively, motion in a circular path due to a force perpendicular to the motion as: (a) speed increases if force increases, with mass and radius constant (b) radius decreases if force increases, with mass and speed constant (c) an increased mass requires an increased force to keep speed and radius constant (F = mv²/r is not required)

Determine the resultant of two or more forces acting along the same straight line

Recall and use the equation work done = force × distance moved in the direction of the force, W = Fd