When a ball tied to a string is swung along a vertical circle , quantity which remains constant is

A particle tied with a string is whirled along a vertcial circle.

When a satellite moves around the earth, the quantity which remains constant is

A 2 kg stone tied at the end of a string of l m len"gt"h, is whirled along a vertical circle at a constant speed of 4 ms^-1 . The tension in the string has a value of 52 N when the stone is

A 2 kg stone tied at the end of a string of l m len"gt"h, is whirled along a vertical circle at a constant speed of 4 ms^-1 . The tension in the string has a value of 52 N when the stone is

1. A stone tied to a string is rotated in a vertical circle. The minimum speed with which the string has to be rotated.

A body of mass 'm' is rotated by means of a string along a vertical circle of radius 'r' with constant speed. The difference in tensions when the body is at the bottom and at the top of the vertical circle is