Rock Grinding
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LOT OF 90 PIECES TOUGH DIAMOND BURS BURRS ROTARY TOOL BITS ROCK GRINDING GEM STONE 3 DIFFERENT GRIT LEVELS FITS DREMEL Sale Price: $24.97  |
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~~ LOT of 90 ~~ . DIAMOND BURRS 3 Grid Levels ***** HOT DEAL! ***** . .. Features: * QUALITY Diamond Burrs for Your Dremel Machine * Convenient Storage Cases Included * Ideal for Sanding, Cutting, Engraving, and Carving on Glass, Ceramic, Tile, Stones, Metal, Wood, Plastic, Fiber Glass, and more... |
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8 Diamond Burs Lapidary Rock Grinding Tools fits Dremel Sale Price: $13.44 |
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8 New Diamond Coated Burs. This is a new set of 8 assorted 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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10 Diamond Burs Lapidary Rock Grinding Tool fits Dremel Sale Price: $13.39 |
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10 New Diamond Coated Burs. This is a new set of 10 assorted diamond coated burs. They can be used with a Dremel tool. These are 150 grit. This master diamond bur set allows you to shape, grind and finish with precision... |
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50 INDUSTRIAL DIAMOND BURR GLASS ROCK LAPIDARY for ROTARY TOOLS List Price: $18.95 Sale Price: $21.95 Average Rating:  |
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Assorted shapes and sizes for your detail 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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Grinding Stone (Dig) List Price: $21.98 Sale Price: $10.51 Average Rating: |
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Limited Edition Japanese pressing of this album comes housed in a miniature LP sleeve. Sony. 2008. |
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Drumming With Rock Grinding Sale Price: $0.99 Average Rating:  |
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
