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M₁=10 г=0,01 кг m₁v₁+m₂v₂ -сумма импульсов до взаимодействия m₂=500 г=0,5 кг доски и пули; v₂=0 (m₁+m₂)v - импульс доски и пули; v=10 м/с применяем з-н сохранения импульсов: v₁=-? m₁v₁+m₂v₂=(m₁+m)₂v; т. к. v₂=0,то имеем следующее ур-е: m₁v₁=(m₁+m₁)v: выразим (v₁), v₁=(m₁+m₂)v/m₁; v₁=(0,01+0,5)10/0,,01=510 м/c.
m₂=500 г=0,5 кг доски и пули;
v₂=0 (m₁+m₂)v - импульс доски и пули;
v=10 м/с применяем з-н сохранения импульсов:
v₁=-? m₁v₁+m₂v₂=(m₁+m)₂v; т. к. v₂=0,то имеем следующее ур-е: m₁v₁=(m₁+m₁)v: выразим (v₁),
v₁=(m₁+m₂)v/m₁;
v₁=(0,01+0,5)10/0,,01=510 м/c.