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If there are two equal and opposite forces on something you say the forces are?
If the forces are balanced they will have no action or the object, if not they will accelerate the object in the resultant direction of the two forces..
Is static electricity caused by friction?
It is! To create static electricity you need friction.
What electric charges do not need to be touching to exert forces on each other?
static electricity
Do we need static electricity?
Yes, because we would have no electricity if we didn't.
Why do people need to know how static electricity is formed?
It is a simple test.
What is need of static method?
If you need to access a method without creating an object of corresponding class, it need to be a static method.
Why static is used in main method?
It is declared static because the JVM would need to execute the main method and if it is not static the JVM would need an object of the class to access the method. How can the JVM get an object of a class without invoking it. since it is static, the JVM can easily access it without this need to have an object of the class.
How would you make an object reach equilibrium if it's not moving?
If it isn't moving, it is already in equilibrium, and you don't need to do anything more.
Is the net force acting on an object always zero?
No because if it was, nothing would ever accelerate. If you apply a net force to an object, it accelerates. The net force acting on an object is always zero if and only if it is in static equilibrium; that is, the object is not moving (rotation or translation) or moving with constant velocity. Given that an object is in static equilibrium, you can say that the net force and moments in all three cartesian directions are zero.
Why do you have to exert extra force to get a heavy object moving and then have to keep applying force to keep it moving at constant velocity?
the heavier and the bigger the object the more force you need to use to keep it moving . the less weight and the smaller an object is the less force you need to use to keep it moving. it always depends on the weight of the object and the size of the object.
What is the force that keeps an object in motion?
An object which is moving doesn't need a force to keep it moving.
Can main method be non-static?
No, the reason is simple: A method marked as a static means, that you don't need create an instance (create an object with the 'new' operator) in order to use it. The main method is the entry point for a java application, therefor there is nothing after you call it. no one who can create an object of the type of your class and call the main method. So the jvm must call the main method with no object reference.
Is the net force zero if the object is not moving?
Yes, but an object with net force of zero may still be moving. The net force is zero if the object is not accelerating.
Advantages of static keyword in java?
When we want that a class member should be used independently of any object of that class, we have to precede that member's declaration with the keyword static .When a member is declared as static, it can be acccessed without creationg an object of the class and without referring to the object.That static is , a static member belons to a class as a whole and not to any one instance/object of that class.The static member is shared by all objects of thatclass.
Why the main function is public and static?
The main function is public because it means it needs to be called by any object. I had to check this myself but if you try to make the main function in Java private it will give you a run time error. It is static because it is indicating it is a class method and it does not need to be instantiated. Without the static keyword you would need to do something like this Main main = new Main();
If there are two equal and opposite forces on something you say the forces are?
If the forces are balanced they will have no action or the object, if not they will accelerate the object in the resultant direction of the two forces..
Why main function written as public static in java?
They are public because they must be accessible to the JVM to begin execution of the program. Main is the first method that would get executed in any class.They are static because they must be available for execution without an object instance. you may know that you need an object instance to invoke any method. So you cannot begin execution of a class without its object if the main method was not static.OrMain is starting point of the program execution Main method is called by JVM there is no need for JVM tocreate an object of the class just to access Main function
