Physics (AS & A Level) · Oct / Nov 2017 · Paper 12 · Question 10

Two blocks of masses M and m are joined by a thin string which passes over a frictionless pulley, as shown. The acceleration of free fall is g. What is the acceleration a of the two blocks?

1. A\frac{(M + m)}{(M - m)} g
2. B\frac{(M - m)}{(M + m)} g
3. C\frac{M}{m} g
4. D\frac{m}{M} g

As printed in the paper