Applied Mechanics and Graphic Statics
A stone is whirled in a vertical circle, the tension in the string, is maximum

When the stone is at the highest position
When the string is horizontal
When the stone is at the lowest position
At all the positions

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Applied Mechanics and Graphic Statics
The maximum displacement of a particle executing S.H.M. corresponds to

Zero kinetic energy and maximum potential energy
Minimum kinetic energy and minimum potential energy
Maximum kinetic energy and maximum potential energy
Zero potential energy and maximum kinetic energy

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