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A static block is used for static initialization of a class and is executed when the class is loaded, before any objects are created. It can initialize static variables or perform any setup that only needs to happen once. In contrast, a constructor is called when an instance of a class is created, allowing for instance-specific initialization. Constructors can take parameters and are used to set up the state of an object.

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What is a static block?

A static block is a code block defined with the 'static' keyword and is not inside others blocks. The static block is executed when the class is first loaded and the main purpose is perform all the initialization that may not be appropriate inside a constructor.


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To pull a 75 kg block horizontally, you need to overcome the force of static friction between the block and the surface it's on. The force required would depend on the coefficient of static friction between the block and the surface. You can calculate it using the formula: Force of friction = coefficient of static friction × normal force.


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Functions and Constructors are similar in many ways. They can have arguments, they can have any amount of code, they can access the class's variables etc. the only difference is that a method in java needs to mandatorily have a return type but a Constructor in java cannot have a return type. It always creates and returns an object of the class for which it is the constructor. You cannot return a value from a constructor explicitly and if you try to do that, the compiler will give an error. The system knows that the purpose of the constructor is to create an object of the class and it will do the same irrespective of whether you declare a return type or not.


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