Applied Mechanics and Graphic Statics
If the angle of projection is double the angle of inclination (α) of the plane on which particle is projected, the ratio of times of flight up the inclined plane and down the inclined plane, will be

½ cos α
2 cos α
½ sin α
½ tan α

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

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

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