Physics

Problem

Two blocks of masses

2.0\,\mathrm{kg}

and

1.0\,\mathrm{kg}

are connected by a light rigid bar and rest on a horizontal, frictionless surface. A horizontal force of

12\,\mathrm{N}

is applied to the

2.0\,\mathrm{kg}

block only. What is the acceleration of the center of mass of the two-block system? a)

6.0\,\mathrm{m/s^{2}}

4.0\,\mathrm{m/s^{2}}

2.0\,\mathrm{m/s^{2}}

12\,\mathrm{m/s^{2}}