Two identical pulley setups are compared. In case I, mass m is lifted by attaching mass 2m. In case II, mass m is lifted by pulling the free end with constant downward force F=2mg. The acceleration of m in case I is:

Question

G1 Physics · Accepted Answer

Case I is an Atwood machine with acceleration g/3, whereas case II has tension 2mg so the mass m has upward acceleration g. Thus case I acceleration is less. Option C.