Rock Grinding
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 MT05 05 60 PCS DIAMOND BURR ROCK GRINDING DREMEL TOOL  US $10.51
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 MT05 04 20 PCS DIAMOND BURR ROCK GRINDING DREMEL TOOL US $3.49
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8" X 2" X 100 Grit Sachi Perfect Diamond Grinding Lapidary Rock Cabochon Wheel Sale Price: $169.99  |
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High quality nickel electroplated diamond lapidary grinding wheel for rock grinding, cabochon making and general grinding of any material. Will not groove or get out of round like a stone wheel. |
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50pc DIAMOND BURR SET- Ceramics Tile Glass Lapidary for ROTARY TOOLS List Price: $14.95 Sale Price: $9.51 |
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Assorted shapes and sizes for your work. Use them to remove burrs on glass, metal, stone, wood, ceramics, fiberglass and plastic. Diamonds are nickel-bonded to the surface and are of fine to medium grit... |
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20 Diamond Burs Lapidary Rock Grinding fits Dremel Tool Sale Price: $13.50 |
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20 New Diamond Coated Burs. This is a new set of 20 diamond coated burs. These are 150 grit. They can be used with a Dremel tool. This master diamond bur set allows you to shape, grind and finish with precision... |
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Elenco Electronics Discovery Planet Rock Tumbler Refill Kit List Price: $23.95 Sale Price: $7.97 |
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DISCOVERY EXCLUSIVE!The Discovery Rock Tumbler Refill kit will keep you rolling with two bags each of gemstone rocks, grinding, polishing and finishing powders. The kit also has jewelry settings for one necklace, four rings and three pairs of hanging earrings, and a bottle of glue... |
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Drumming With Rock Grinding Sale Price: $0.99 |
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Master Jewelers 10 Diamond Circular Saw Blade Set in Display 50 Rough Diamond Burrs Burs Rock Grinding Cutting Shaping Gem Stone Glass Works in Display 1 Wax Probe Diamond Pick Tool Combo Rotary Tool Bits Set for Dremel -- Best Seller on Amazon! Sale Price: $49.99 |
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10 pc Diamond Coated Cutting Saw Blades with Arbors, Factory Sealed This tool is perfect for cutting or sanding gem stones and glass The discs are electroplated on both sides for extended life This product is great for jewelers, watch makers, and craftsmen The diamond coated discs are 0... |
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Extra Coarse Sea Salt, 1 lb. Sale Price: $2.99 |
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Coarse Sea Salt, 1 lb. |
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1923 Print Homemade Flour Mill Grinding Wheat Lava Rock Kitchen Sardinia Italy - Original Halftone Print List Price: $38.95 |
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This is an original 1923 halftone print featuring a vintage flour mill, the same model as those unearthed at Pompeii and Herculaneum, showing the entire process of cleaning and grinding the wheat, and sifting the flour in an Italian home in Sardinia, an island in the Mediterranean sea... |
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Grinding Stone (Dig) List Price: $21.98 Sale Price: $11.14 |
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Reissue of 1973 album for the Irish blues-rock guitarist who played with Skid Row and Thin Lizzy. Highlights include the soulful 'Spirit' and the raunchy 'Boogie My Way Back Home'. Fully annotated booklet contains an interview with Moore... |
Calculate the horizontal distance from the base of the building to the point where the rock strikes the ground
A man stands on the roof of a building of height 16.3 m and throws a rock with a velocity of magnitude 26.1 at an angle of 25.8m/s above the horizontal. You can ignore air resistance.Calculate the magnitude of the velocity of the rock just before it strikes the ground.
I assume that the angle is 25.8 DEGREES above the horizontal.
The vertical component of the initial velocity is Vup=Sin(25.8)*26.1
The horizontal component of the initial velocity is Vh=Cos(25.8)*26.1
The time that it takes to reach the top of the arc of travel is Tup=V/g
The distance traveled up is Dup=1/2*g*Tup^2
The distance traveled down in Ddown=Dup+16.3
The time taken to travel down is Tdown=sqrt(Ddown/g*2)
The vertical component of the velocity at impact with the ground is Vdown=g*Tdown
The velocity at impact is Vi=sqrt(Vdown^2+Vh^2)
The distance traveled horizontally is Dh=(Tdown+Tup)*Vh
The distance from the base of the building is 83 meters
The velocity at impact is 33.08
