Question: You and a friend are entering an egg toss contest. The goal of this contest is to toss an egg the greatest distance without it cracking or breaking open. Describe your strategy for catching eggs that have been thrown a long distance without them breaking in terms of physics. Use terms like impulse and momentum.
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Student's Response was:
When trying to catch an egg with the furthest distance, there are several things to keep in mind. Things such as the weight of the egg, the distance you are throwing it, and how you catch the egg can change the results greatly.
First off, when throwing something as small as an egg, one must keep in mind that the further the distance, the more force is exerted into throwing the egg. With more force exerted into the egg, the more momentum there will be. This is especially important when catching the egg, because catching it the wrong way can result in it breaking.
The catching of the egg can be particularly difficult, because the egg is very brittle and fragile. In order to reduce the momentum, you must grab the egg by its sides so it does not splatter on your hand. The egg's impulse which is it's average force over a period of time, must be reduced in order to ensure a safe landing for the egg. By grabbing the egg by the sides, you are reducing it's momentum and impulse to later make the egg fall into your palm.
Tutor's response was: To win the competition, we need to throw the egg as high as we can. So when it fall down, it will have a high velocity as well. Mass of the egg is fixed. So if we need to win this competition, we should be prepared to face a high momentum that we will receive when it come down. Lets say that we take time "t" to catch this egg. So the force while catching the egg will be "F" given by:
F*t=m(vf-vi)
So F= m(vf-vi)/t
And we have already seen that mass m is fixed.
Also Vf =0 because the egg finally comes to rest after catching.
Vi is the velocity which was there just before catching the egg and we have already seen that, it will be very high if we want to win the competition.
Now, in order to decrease the force, the only thing that we can do is to keep the time of contact with our hands "t" as high as possible.
If we do that we will be able to reduce the force F to such a limit that the egg even though quite brittle, wont break.
To increase the time of contact we need to catch the egg in sweeping action. We need to move our hands downwards so that the relative velocity between the hand and the egg becomes less. This will effectively increase the time "t" and hence the Force F will be reduced.
When you go down on a woman the one thing you may be thinking about above all is "how long will it take once I start to lick before she is able to come?"
This is a very valid question but is secondary and should be put in the back of your mind. Instead you should focus on the types of licks that your woman will respond to the best. Making her feel good and relaxed has much higher priority than the time you'll be spending.
There are 4 licks that all guys should become familiar with and they are:
Mastering these 4 licks can help you figure out what gets her going and can ultimately head to you being able to find your rhythm. Once you are able to put together that magical combination of licks and finger strokes that brings your lady to the brink then you are as good as gold. It all starts with the big 4 parts of the cunnilingus tutorial.
Ice Cream Cone:
This one is just as it sounds. Make your tongue as wide and flat as possible and start from the bottom and slowly make your way to the top. You want to cover a lot of ground and make each lick as long, fluid 物理補習炮台山 and continuous as possible. The Ice Cream Cone licks is best used when making a transition from one tongue technique to another.
Up and Down Each Side & Circle:
These two are definitely better when used together. Much of giving cunnilingus is finding the right combination of licks and having your woman be relaxed enough to be able to willingly receive them.
After you've kissed all areas of her vagina using only your lips and then transitioned with a few long and succulent Ice Cream Cone licks you should be ready to really hunker down and find a rhythm. The Up and Down lick is great for this experimental phase.
The key to this basic yet powerhouse move is that you want to use your fingers to hold open her labia just enough for your tongue to run up and down the channels between her inner and outer lips along both sides of her clitoris.
Circles (again):
Circling her clitoris with your tongue can be a great way to both mix things up for you and your tongue while at the same time keeping a rhythm that allows her to continue building up towards an orgasm. When you circle your tongue should not be wide and flat, instead make it a little more pointed. Also, try to maintain constant contact and not lift up your tongue too much.
Side-to-Side Flick:
If done properly and at the right time this one could take her over the top. By now you woman should be fully aroused and you should have a rhythm working. If things are going right then she may be moving her hips closer to your face or pushing your head down closer to her crotch. When she is showing these signs or her special move or noises that let you know she is close then you want to take your tongue and flick from side to side directly on her clitoris. You are moving your tongue horizontally. This is one of the few times that you want to lick her clitoris directly.