Physics

Problem

On a smooth incline, a block is observed to accelerate down the slope at

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

. Take

g = 9.8\,\text{m}\,\text{s}^{-2}

. The angle

\theta

that the plane makes with the horizontal is approximately a)

42^{\circ}

22^{\circ}

24^{\circ}

66^{\circ}