Agriculture Mechanics I.  Square measure is a system for measuring area. The area of an object is the amount of surface contained within defined limits.

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Presentation transcript:

Agriculture Mechanics I

 Square measure is a system for measuring area. The area of an object is the amount of surface contained within defined limits.  The area of a square or rectangle is equal to the length times the width or; ◦ A = l x w  For example the square below is four square inches. 2” 1 in² A = l x w A = 2 x 2 A = 4 in²

 The area of a circle is equal to pi times the radius squared. ◦ A = π x r²  For example, a circular grain silo has a round floor 18 feet in diameter. What is the area of the circle? 18’ d = 18’ r = 9’ π = 3.14 A = π x r² A = 3.14 x (9 x 9) A = ft.²

 The area of a triangle is equal to one half the base (b) times the height (h). ◦ A = ½ (b x h)  Example: What is the area of a triangle with a base of 2 yards and a height of 3 yards. 3 2 b = 2 h = 3 A = ? A = ½ (b x h) A = ½ (2 x 3) A = 3 yds²

 A cubic measure is a system of measurement of volume or capacity of an object expressed in cubic units.  Linear measure adds only one dimension to find total distance.  Square measure multiplies two dimensions to find area of a surface.  Cubic measure multiplies three dimensions (length, width and height) to find the volume of structures.  When determining volume of an object, all measurements must be expressed in the same units of measurement.

 The volume of a rectangular solid is equal to the length (l) times the width (w) times the height (h). ◦ V = l x w x h  Example: Determine the volume of the rectangular crate pictured below. 4’4’ 4’ 6’ V = l x w x h V = 6 x 4 x 4 V = 96 ft³

 The volume of a triangular prism is equal to the area of the triangle times the length of the prism. ◦ V = ( ½ (b x h)) x l  The volume of a cylinder is equal to the area of the circular base times the height of the cylinder. ◦ V = ( π x r²) x h