Applied Mechanics and Graphic Statics
A Second's pendulum gains 2 minutes a day. To make it to keep correct time its length

Must be increased
Must be decreased
Is not changed but weight of the bob is increased
Is not changed but weight of the bob is decreased

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

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