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Explain which of Newton's laws of motion...

Explain which of Newton's laws of motion are applicable in the following cases.
(1) A person swimming in water.
(2) A person gets hurt when jumping on the hard cement surface.
(3) A mango falls from the tree when the branch of the tree is suddenly shaken.
(4) The recoil of the gun when the bullet is fired from it.
(5) To compare accelerations produced in spheres of mass m and 2m, when equal force is applied to them.

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