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If you have a bicycle with 3 gears on the back wheel, why is it easier to peddle in some gears than others?
(Hint: remember that to change a moment of inertia the distribution of the masses has to change and also think about what provides a torque on the back wheel)? Which gear is the easiest to peddle in (larges middle or smallest)?
2) If you want to push a merry-go-round and make it as easy as possible, where should you tell your friends to sit?
3) Explain why your arm works and why your muscles (not your arm itself) are amazing. (Hint: think about where the muscle attaches.
1) You never get something for nothing. Little pedal gears and big wheel gears let you go fast, but you need to push harder. Big pedal gears and little wheel gears make you not need to push so hard, but you don’t go so fast.
2) Moment of inertia I = MR^2. So move your friends to the middle to minimize I.
3) Your muscles contract. They hook on to your armbones above the joints, so by contracting, they cause the bones to rotate about the joints.
How to Use Merry Muscles Baby Jumper Bouncer Jolly Exerciser
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Merry Muscles & Clamp Baby BoUnCeR Exerciser Jolly Jumper $120.58 |
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Bouncer Jumper & Clamp* RED *Ergonomic*Merry Muscles Baby Exerciser Doorway $114.95 |
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NEW Ergonomic Merry Muscles & Kling Klamp Baby Exerciser Bouncer Jumper $114.95 |
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Scientific Design* Ergonomic*BLUE Merry Muscles Baby Exerciser Doorway Jumper $84.95 |
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Ergonomic Merry Muscles Baby Exerciser Doorway Jumper $84.95 |
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For babies up to 40 lbs! Merry Muscles Baby Exerciser Doorway Jumper Bouncer $84.95 |
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NEW Kling Klamp Door Clamp for Baby Jumper or Swing Merry Muscles $40.16 |
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Merry Hempsters Vegan Hemp Hot Muscle Rub $7.50 |
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MERRY HEMPSTERS Cool Hemp Muscle Rub Tube .6 oz $5.75 |
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MERRY HEMPSTERS Hot Hemp Muscle Rub Tube .6 oz $5.75 |
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Merry Hempsters Hot Hemp Muscle Rub, 0.6 oz $3.78 |
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Merry Hempsters Cool Hemp Muscle Rub Tube, 0.6 oz $3.78 |
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Dirty Mary Crazy Larry (Supercharger Edition) $9.98 Susan George (Straw Dogs) is ex-groupie Mary and Peter Fonda (Easy Rider) is wannabe-NASCAR driver Larry. They’re thieves on the run from sheriff Vic Morrow (The Blackboard Jungle), who carries neither gun nor badge. According to director John Hough (The Legend of Hell House), his white trash cult classic was “an action picture with a lot of stunts.” That about sums it up. The Tarantino favorite i… |
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Merry Hempsters Cool Hemp Muscle Rub Tube … |
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Cool Hemp Muscle Rub Counter Display 0.6oz/12pc from The Merry Hempsters $48.12 Cool Hemp Muscle Rub Counter Display 0.6oz/12pc from The Merry Hempsters The Merry Hempsters new vegan salves all have their own unique healing properties. They all however have the benefits of high EFA organic hempseed oil. Our compact point of purchase displays use little room and have great visibility. Cool Hemp Muscle Rub has traditionally been used as a therapeutic rub for sore muscles, and… |
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The Merry Hempsters Hot Hemp Muscle Rub Counter Display 0.6oz/12pc from The Merry Hempsters $44.99 Hot Hemp Muscle Rub Counter Display 0.6oz/12pc from The Merry Hempsters The Merry Hempsters new vegan salves all have their own unique healing properties. They all however have the benefits of high EFA organic hempseed oil. Our compact point of purchase displays use little room and have great visibility. Hot Hemp Muscle Rub has traditionally been used as a therapeutic rub for sore muscles, and f… |
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Standard Guide to 1: 18 Scale Die-Cast Cars (Standard Catalog) $26.99 - First book of its kind devoted exclusively to large-scale models, – From the publishers of “Toy Cars & Models magazine, providing comprehensive coverage of the model car hobby- Identification and price guide for 1:18 scale models from Ertl American Muscle, Mattel, and much more… |
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TOY CARS & MODELS January 2005 Volume 8 No. 1 Issue No. 82 (Magazine. Hot Wheels. Cars&Models. Larry Wood on Hot Wheels. Muscle Cars from Tom-C-Toys. 1969 Pontiac Grand Prix SJ 428, RC2 on cover.) … |
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