Applied Mechanics and Graphic Statics
The following is in unstable equilibrium

A uniform solid cone resting on its base on a horizontal plane
A uniform solid cone resting on a generator on a smooth horizontal plane
A solid cube resting on one edge
A satellite encircling the earth

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Applied Mechanics and Graphic Statics
Pick up the incorrect statement from the following. In a simple harmonic motion

Acceleration is minimum at the end of the stroke
Velocity is minimum at the end of the stroke
Acceleration is zero at the mean position
Velocity is maximum at its mean position

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