An object of mass M is attached to a string.  The length of the string is r and has no mass.  The objects moves in a vertical circle counterclockwise as shown. When the ball is at point F, the string is horizontal. Point E is at the bottom of the circle and point D is at the top of the circle. Air resistance is negligible. Express all algebraic answers in terms of the given quantities and fundamental constants. = The maximum tension the string can have without breaking is Tmax . Derive an expression for vmax, the maximum speed the ball can have at pointE without breaking the string.

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.