JEE Main 2007 Physics question
A block of mass ' m ' is connected to another block of mass ' M ' by a spring (massless) of spring constant ' k '. The blocks are kept on a smooth horizontal plane. Initially the blocks are at rest and the spring is unstretched. Then a constant force 'F' starts acting on the block of mass 'M' to pull it. Find the force on the block of mass 'm'
Answer: (3)
Solution
Taking the intended answer as the force on m when both blocks move with a common acceleration (the spring force when the system accelerates together): and the force on m is
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