# Civil Engineering Objective Questions { Applied Mechanics }

78. A projectile is fired at an angle 0 to the vertical. Its horizontal range will be maximum when 0 is

79. If the velocity of projection is 4 m/sec and the angle of projection is a?, the maximum height of the projectile from a horizontal plane, is

80. If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maxi-mum range, is

81. If the angle of projection is double the angle of inclination (a) of the plane on which particle is projected, the ratio of times of fligh up the inclined plane and down the inclined plane, will be

82. The angle of projection for a range is equal to the distance through which the particle would have fallen in order to acquire a velocity equal to the velocity of projection, will be

83. The direction of projection should bisect the angle between the inclined plane and the vertical for a range of a projectile on inclined plane

84. A body is said to move with Simple Harmonic Motion if its acceleration, is

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