Physics

Problem

A particle moves counter-clockwise in a circle of radius

2.5\,\text{m}

with a speed of

5.0\,\text{m}\!/\!\text{s}

that is increasing at

4.0\,\text{m}\!/\!\text{s}^2

. Determine the angle, measured from the inward radial direction toward the direction of motion, at which the net acceleration vector points.