Physics

Problem

4\,\text{kg}

block rests on a horizontal surface with coefficient of kinetic friction

\mu_k = 0.25

. It is connected by a light string over a smooth pulley to a hanging block of mass

5\,\text{kg}

. When the system is released, what is the magnitude of the acceleration of the blocks? (Take

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

.) a)

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

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

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

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