QUESTIONS PHYSICS ANSWERS

Why are some object accelerated and other are not? How can an object traveling in one direction be accelerated in another direction? What are the causes of the increase in the velocity of a moving object? These question and other can be answered when we extend our discussion of motion of object to another branch of mechanics known as Dynamics (after the Greek word Dynami meaning power). In dynamics, one discusses the cause of motion and how, they affect the motion? In the study of kinematics, we need to know only the position of the object at a certain time in dynamics the pushes or pulls which cause resist the motion, are studied.

It our dally observation that we need force to make a body move.

For example, we must kick a football to make it move and push or pull a cart to carry it from one place to another.

Thus we can say that force is that agent which can produce motion in a body but sometimes force may not succeed in producing motion in a body.
For example, if a boy pushes a bus at rest it will remain at rest although the push of the boy tends to produce motion in a body. Hence one must say that force is that agent which tends to produce motion in a body. Even this definition is not complete because force can also be used to stop the motion in a body.

It is a matter of common observation that when we catch a moving cricket ball, we apply a force in a direction opposite to that of the moving ball thus stopping the motion of the ball.

Therefore the complete definition of force would be, force is an agent which changes or tends to change the state of rest or the motion of a body.

I WANT TO LAUGH

Bored of the daily monotony of your family life? Want to try out something new to spice up the moods? Well, here are some family fun ideas that are practical and easy to try. They are hardly expensive and give you memories to cherish for a long time too! Read on... Shift the furniture and give the home a new look. Planning and shifting the furniture around and giving home a makeover can be a fun thing to do! It will get the whole family involved in planning and working on the stuff. The creative ideas would be mixed with confusion and random change of plans! It will involve some physical labor too and as a result you get a free home makeover! Try it out! Plant some garden flowers together: Give the gardener a break and get some stuff done together with the family for a change! Gardening can be fun and every member of the family can contribute to this. Even the toddlers can sit back and enjoy the gardening flowers with you! Just get the gardening equipments in place and decide what exactly you would like to plant and where. Make a funny family video and put it up on YouTube: This is easy! Just take out your video camera and record the family members doing their usual activities. Irritate them a bit and provoke them to say silly stuff. Edit the video later with them, and add funny speech bubbles, one liner comments and background music. Share it with all family friends and relatives and request them to comment on it! Hopefully they will contribute and you guys can have a group chat about the whole video too. It can keep you amused for days. You may even win a few bucks on America's Funniest Home Videos! Dig out the old family albums and share the memories: Checking out the old family albums together can be another great family fun activity, especially on the lazy relaxed days! Just get together and flip through the pictures. Your parents will probably have a lot to say about their marriage and the old friends in the pictures, or about your old childhood habits. Share the laugh and watch time fly! Plan a garage sale: If you haven't tried this one yet, you are surely missing out on some great family fun! Clear out the rubbish from your home, the basement, the attic, etc, and earn money out of it too! Hosting a garage sale is a whole lot of fun, and most of you can join in and contribute to it! Party together with the money you make out of it, or purchase a family asset, like a new garden swing, or a television set, etc. Make sure that you get the whole family involved in the fun that you plan to have. Schedule the plan for such a day when you know that every member of the family would be free and at home. Preparing well for family fun, can make it a lot more enjoyable! Anita is a freelance writer for online publications and writes for family enjoyment and child education. If you truly want to have some fun and laughter, go to this Kid-Friendly Website A top line resource on clean humor for young families with lots of things for kids to get involved with.

CAN YOU LAUGH?

When thinking about humor have you ever heard that the closest thing to laughter is tears? I can just picture my grandma now, hopelessly out of control, laughing so hard she was shaking, with no noise coming out but unable to stop, mouth wide open, and eyes crinkled in glee, with big crocodile tears running down her face. It's kind of odd, the two sides of humor, we laugh, we relax, we find relief, but a lot of times there is pain involved, and laughter can be redeeming, or hurtful. Sometimes the most horrible things actually turn out to be humorous. I know that lots of little kids think farts and bathroom jokes are funny, but I thought I got over bathroom humor when I was a teenager. I was going to a wedding, I had just had a baby, and my husband and I had to drive several hours to get there. It was a challenge with a newborn, plus none of my clothes fit me. After shopping for hours, I finally found a springy green outfit I thought was perfect. I was pretty exhausted, but my baby girl with several outfits to spare, my husband, my new green suit, and I finally arrived. I thought I would change her diaper just before the service and held the baby on a blanket on the trunk of the car to change her diaper. She pooped-not an ordinary poop-an explosive out of this world poop, I've never seen anything like it! I was covered in poop from my knees to my face. And what did I do, I didn't scream or get angry, I laughed. I couldn't stop laughing. I missed the wedding, I threw my new green suit away. I went to the formal reception in an orange tee shirt and cut off jeans while my pristine baby girl stole the limelight in her perfect white dress. Getting sprayed in poop, missing an important wedding, wasted hours and money, pretty awful, but also pretty hysterical. I looked up a list of oxymorons, which are defined as contradictory terms put together. Some of the funniest ones are birthed through hard experience. How about friendly weapons, airline food, legally drunk, or my favorite, Microsoft Works? Kids are always screaming, "It's not funny!" as siblings or other kids laugh at their ludicrous situations. Sometimes even as an adult I have to restrain a chuckle at the humor, when I see a youngster slip on their rear, or end up covered in goo. Watching America's Funniest Home Videos you have to laugh, but "Ouch!" often pops out in the same breath. Why is getting kicked in the crotch so incredibly painful and yet funny at the same time? I think the intention in the humor has a lot to do with it. When people are purposely mean, or make fun of others, it may be funny but it's not fun. Being a brunette I love blond jokes. Have you heard the one about the blond who got fired from the pharmacy? She didn't put any labels on the bottles because they wouldn't fit in the typewriter! But yeah, I know blond jokes are always short because that is all brunettes can remember. Being willing to laugh at yourself, and trying not to hurt others, goes a long way to making difficult situations bearable, and often humorous.