knife carrying roll
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 60 Knife Carrying Case Roll-up List Price: Sale Price: $11.95 You save: $7.05 (37%)  Eligible for free shipping!Availability: Usually ships in 1-2 business days DescriptionThis deluxe 60 Knife Roll-Up Carrying Case features durable quality construction with a soft inner liner that is designed to accommodate up to 60 knives. The heavy duty carrying handle features strong double riveted clasps...  |
 Spyderco Small Spyderpac 18 Pocket, Black List Price: Sale Price: $33.17 You save: $6.78 (17%) Eligible for free shipping!Availability: Temporarily out of stock. Order now and we'll deliver when available. We'll e-mail you with an estimated delivery date as soon as we have more information. Your credit card will not be charged until we ship the item. DescriptionSpyderco's 18-pocket SpyderPac is an impressive and safe way to carry and display your knife collection. It's half the size of the large SpyderPac and fits neatly in a suitcase or portfolio. Each pocket is 4-1/2" X 2-1/2"... |
Laws of Motion: Conceptual Questions?
1) Which of the following exerts the greatest gravitational force on you?
A. Earth
B. Your classmate
C. Sun
D. The star in your zodiac
2) Your empty hand is not hurt when it bangs lightly against a wall. Why is it hurt if it does so while carrying a heavy load? Which of Newton's laws is most applicable here?
3) In the orbiting space shuttle you are handed two identical boxes, one filled with sand and the other filled with feathers. How can you tell which is which without opening the boxes?
4) Why is a massive cleaver more effective for chopping vegetables than an equally sharp knife?
5) In tearing a paper towel/plastic bag from a roll, why is a sharp jerk more effective than a slow pull?
Please answer and give reasons.
1. A, Earth. g=GM/r^2. Earth is the largest mass near enough to exert a large force.
2. 3rd law. F=ma. Same acceleration, assuming same velocity, but your hand effectively has greater mass, so a greater force is needed to stop it.
3. Throw them at the same speed and make each one hit a bathroom scales. The one that registers the bigger weight is the sand. Sand is considerably denser, so the box of sand has more mass.
4. It isn't, it just seems that way. If that's wrong, it's possibly because of the greater mass of the cleaver.
