Physics
A spring is an example of which of these

Newton's 1st law
Newton's 3rd law
Hooke's law
Conservation of mass law

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Physics
A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ?

The question is incomplete because the masses of the spheres are not given.
B will reach the ground first.
Both the spheres will reach the ground simultaneously.
A will reach the ground first.

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