Applied Mechanics and Graphic Statics
Two shots fired simultaneously from the top and bottom of a vertical tower with elevations of 30° and 45° respectively strike a target simultaneously. If horizontal distance of the target from the tower is 1000 m, the height of the tower is

350 m
400 m
425 m
375 m

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Applied Mechanics and Graphic Statics
Kinetic friction may be defined as

Friction force acting when the body is in motion
Friction force acting when the body is just about to move
Angle between normal reaction and resultant of normal reaction and limiting friction
Ratio of limiting friction and normal reaction

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