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To get a flat, uniform cylindrical satellite spinning at the correct rate, engineers fire four tangential rock

If the satellite has a mass of 3700 , a radius of 4.6 , and the rockets each add a mass of 240 , what is the required steady force of each rocket if the satellite is to reach 30 in 5.1 , starting from rest?

Equations for angular acceleration and change in angular velocity:

Δω = αΔt
α = τ/I

Combine them

Δω = (τ/I)Δt

We know Δω, I, Δt and part of τ.

Δω is 30
Δt is 5.1
I = I(cylinder) = ½mr^2 = 0.5×3700×(4.6^2) = 39146
τ = rF = 4.6×F, and we are looking for F

Plug everything in

Δω = (τ/I)Δt
30 = [(4.6×F)/(39146)]5.1
F = 50058.82

EDIT: Oops! I forgot about the _four_ rockets and their masses. Redo the calculations with

I = I(cylinder) + 4×240×4.6^2

Then divide the final force by 4.

!


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Riedel H2O Water/Juice Glass, Set of 2


Riedel H2O Water/Juice Glass, Set of 2


$18.00


Make sure your bar is well-stocked with glasses suited to the drink. These easy-to-hold stemless glasses are simple and elegant. Machine made with non-leaded crystal, these glasses are dishwasher safe, but we recommend hand-washing for the life of your glasses.Made in Bavaria, GermanyIf you'd like to add gift wrapping and a personalized gift message on a handwritten card, please select Gift Wrap b...

Cuisipro Scoop and Stack Ice Cream Scoop


Cuisipro Scoop and Stack Ice Cream Scoop


$18.50


Cuisipro Ice Cream Scoop and Stack Cuisipro's Ice Cream Scoop and Stack creates cylinder-shaped blocks of ice cream for cones, waffle cups, or playful desserts. This tool effortlessly cuts through the hardest ice cream and works with a simple twist and lift action and push button release. This tool is dishwasher safe. Available in Green, Pink, or White. Features: Cuts through hard ice cream Twist ...

Style Head Protection Pillow


Style Head Protection Pillow


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810514 Features: -Head protection pillow.-Provides perfect protection to an infants tender head and helps prevent flat head symptoms.-Shaped like a piyo piyo duckling....

PanaVise 396 Wide Opening Head PanaVise


PanaVise 396 Wide Opening Head PanaVise


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Wide gripping head with the full tilt, turn and rotatation capabilities of the PanaVise split ball Jaws open to 6" (152.4mm) to accommodate most PC boards in its molded, deep-ribbed neoprene jaw padsWhen pads are reversed, the wide "V" can be used for securing delicate items, such as tuners, coils, motor armatures, etc...

Sandvik Coromant CoroDrill Delta-C R840 Carbide Drill Bit, TiAlN Finish, Cylindrical no Flat Shank, Helical Flute, Coolant Through, 140 Degree Split Point, 5.4mm Size, 28mm Cutting Length


Sandvik Coromant CoroDrill Delta-C R840 Carbide Drill Bit, TiAlN Finish, Cylindrical no Flat Shank, Helical Flute, Coolant Through, 140 Degree Split Point, 5.4mm Size, 28mm Cutting Length


$109.00


The first choice in modern high performance machines. A solid carbide drill for small part machining in hole diameters from 0,30 - 25,00mm. Made with a tough fine grained substrate with a wear resistant PVD-coating to increase the productivity. A drill designed for high precision holes, IT8 - 10. Micro-grain carbide cutting material for high resistance to wear and extreme toughness. Flute geometry...

DML Woodworking 62790 Multi-Spur Bit - 1-1/2D x 1/2 Shank Dia. x 6 OAL, Carbide Tipped w/ FLAT, #149


DML Woodworking 62790 Multi-Spur Bit - 1-1/2D x 1/2 Shank Dia. x 6 OAL, Carbide Tipped w/ FLAT, #149


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...

Ultrafire Li-ion 18650 3000mah Battery


Ultrafire Li-ion 18650 3000mah Battery


$3.00


Protected 18650 3000mAh rechargeable 3.6 volt battery - charge with the Ultrafire Multi-Battery charger. The advantage of this cell is that it features a button top making it particularly compatible with many flashlight applications. Rechargeable Lithium batteries are rapidly becoming a very economical way to lower the operating costs of Lithium-Powered flashlights. We offer a number of different ...

6 pcs Tenergy Li-Ion Flat Top 14500 Cylindrical AA 3.7V 800mAh Rechargeable Batteries with Tabs


6 pcs Tenergy Li-Ion Flat Top 14500 Cylindrical AA 3.7V 800mAh Rechargeable Batteries with Tabs


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Tenergy Li-Ion 14500 Cylindrical Rechargeable AA size 3.7V 800mAh


Tenergy Li-Ion 14500 Cylindrical Rechargeable AA size 3.7V 800mAh


$3.79


Features And Benefits

* Li-Ion14500 cylindrical AA size rechargeable batteries
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Löc Claw ® (Black on Tortoise Shell) From Hair to Wrist


Löc Claw ® (Black on Tortoise Shell) From Hair to Wrist



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Löc Claw® is a revolutionary new hair claw/bracelet that, thanks to its innovative inner workings using a hidden band, has claws that lock wide open until your hair is in place, and lock closed when you are ready to comfortably secure the hair.
Löc Claw's new banded technology eliminates the need for the unsightly springs and protruding squeeze handles of the more traditional ...



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