Physics

Problem

3\,\text{kg}

block is released from rest on a rough plane inclined at

30^{\circ}

to the horizontal. The coefficient of kinetic friction between the block and the plane is

0.25

. Take

g = 10\,\text{m s}^{-2}

. What is the acceleration of the block down the plane? a)

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

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

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

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