A mass m1 rests on a frictionless surface. It is attached to mass m2 by a light string which passes over a massless, frictionless pulley, as shown in the figure. The system is released from rest. The initial acceleration a of m2 is given by
a) a=g; b) a=(m1+m2)m2g;
c) a=(m1+m2)(m2−m1)g; d) a=(m1+m2)m1g.
[Figure: Shows mass m₁ on horizontal surface connected by string over pulley to hanging mass m₂]