Physics

Problem

A car rounds a horizontal curve of radius

25\,\text{m}

at a speed of

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

. Instruments in the car register a total acceleration of

12\,\text{m}\,\text{s}^{-2}

. What is the magnitude of the tangential component of the car’s acceleration at that instant? a)

12\,\text{m}\,\text{s}^{-2}

8.0\,\text{m}\,\text{s}^{-2}

3.0\,\text{m}\,\text{s}^{-2}

9.0\,\text{m}\,\text{s}^{-2}