Question about Newtons third law

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In Newton's third law of motion, every action has an equal and opposite reaction, which explains the forces exerted between two colliding blocks. When one block hits another, they do not stop immediately due to the finite time of impact, during which they deform slightly. This deformation allows for the transfer of energy and momentum, resulting in movement rather than an immediate halt. The forces acting on each block during this impact are part of the Newton's third law pair. Thus, the interaction leads to observable motion rather than instant cessation.
yaseen shah
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in Newtons third law of motion every action has equal and opposite reaction so my question is that when block hits another block the blocks exert equal force on another so why they move they had to stop immediately.
 
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On impact, each block will deform slightly. During the actual time taken for the impact (a finite time- not immediate) the blocks will be compressed / twisted / bent and there will be forces acting against each block (the Newton 3 pair).
 

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