Physics

Problem

A car starts from rest and accelerates uniformly along a circular track of radius

100\,\text{m}

so that its speed reaches

20\,\text{m}\,\text{s}^{-1}

after

5.0\,\text{s}

. What is the angle between the car’s total acceleration vector and its velocity vector at

t = 4.0\,\text{s}

? a)

57^{\circ}

33^{\circ}

15^{\circ}

45^{\circ}