The generic equation suggested by a graph showing a half-parabola is which of the following?
y = mx + b
y = kx2
y = k/x

If the force on an object is in the negative direction, the work it does on the object must be [2 points a) negative. b) positive c) the work could be either positive or negative, depending on the direction the object moves

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?