NEET Physics Work, Energy, and Power MCQs

Two blocks of masses $m_1$ and $m_2$ are connected by a light inextensible string passing over a smooth pulley. The work done by the tension on $m_1$ as it moves a distance $h$ upwards is:

Two particles of masses $m_1$ and $m_2$ are connected by a light inextensible string passing over a smooth pulley. If the system is released from rest, and $m_1 > m_2$, what is the magnitude of the change in gravitational potential energy of the system when $m_1$ descends a distance $h$?