Physics - NLM Question with Solution | TestHub

Three masses $M=100 \mathrm{kg},{ m}_1=10 \mathrm{kg}$ and $m_2=20 \mathrm{kg}$ are arranged in a system as shown in figure. All the surfaces are frictionless and strings are inextensible and weightless. The pulleys are also weightless and frictionless. A force $F$ is applied on the system so that the mass $m_2$ moves upward with an acceleration of $2{ \mathrm{ms}}^{-2}$. The value of $F$ is

(Take $g=10{ \mathrm{ms}}^{-2}$)