November 10th, 2009Force
Yo, kids. Is Cool Science Experiments For Kids again.
This time around we gonna go through walls…
Hello…, doc. How can you going through the wall…!!! This ain’t no magic.
No worries guys. This is pure science. I will explain it later, But now, is better to get our hands dirty.
Let’s prepare the material for this experiment:-
a) a marble, if you wanna have more fun then a few
b) a coin make it is big enough to cover the mouth of the bottle
c) a piece of paper (11cm x 30cm)
d) a soda bottle
e) a cellophane tape
Just follow these steps:-
1. Roll the piece of paper, use the cellophane tape to make sure it holds. Now, we will have a 30cm tall cylinder shape paper roll.
2. Put the coin on the mouth of the soda bottle.
3. Next, we put the paper onto the mouth of the soda bottle.
4. The moment of truth, put the marble on top of the paper roll and let it fall…
Can the marble fell into the soda bottle ?
5. What happen?… Something strange ? (Yes, the marble went in the bottle)
Newton’s Third Law states that:
If object A exerts a force on object B, then object B will exert an equal but opposite force on object A.
Or like your teacher always say
“To every action there is an equal but opposite reaction”
In this experiments, when our marble hits the coin, the coin will produce any equal but opposite reaction/foce onto the marble, making the marble bounce back. The hitting force on the marble will causes the coin to temporary leaving the mouth of soda bottle. Thus, resulting the morble fell into the soda bottle.Tags: Force, Reaction
November 10th, 2009Reaction
So your school teacher will tell you something like this…
According to Newton’s Third Law :-
To every action there is an equal but opposite reaction
But, what does he means by every action?
Or even opposite reaction ?
Questions, questions, questions…and more questions.
It is will simple to explain the above statement,
Punch the wall…how do you feel ? Pain right.
So when you punch the wall(action), and the wall reflect back the force of your punch on your hand(opposite reaction). That is why you feel pain.
When a car ramp into a wall at high speed…What happen ? The car bounce back from the wall.
Just go watch NASCAR, or any sports car racing.
The car ramp into the wall(action), it bounce back(opposite reaction)
Our next example is firing a gun. Warning: Hey, kids please do not please with guns. It is an serious offense. We can even hurt ourselves
When one fires his gun, he feels being pushed backwards. Fire guns(action), pushed backward(opposite reaction)
I hope everyone understand Reaction now.Tags: Force, Reaction
October 29th, 2009Force
Phew… It really nice to be back after all the work in school.
Hi, Kids. Do you like magic ?
Last Saturday my school organized a fair for the whole school.
So, I found out this very interesting experiments for you guys. But, during the event this magician keep saying is magic time. Well, I say……”It Cool Science Experiments For Kids Time…!!!”
Let’s start the experiments will the following materials:-
a) a stripe of manila card size: (1.5cm x 30cm) (just ask dad to get it from his office ;))
c)a cellophane tape and
First, use the cellophane tape to stick the two end of the manila card. Becareful, don’t use too much force as we want a round shape paper ring.
Then, put the paper on the mouth of the glass.
Lastly, put the coin on the top of the paper ring.
Now, is ‘SHOW TIME’… Use tip of your finger quicky pull away the paper ring.
What happen? Why?
Guys, haven’t touch up the pictures yet. Coming Soon….
According to Newton First Law,
An object tends to stay at rest and a moving object tends to continue moving with same speed and in same direction unless being acted by an external force
The coin is under the force of gravity, and tends to be pull downward. When the paper ring was being pull away at a fast pace, the coins will tends to fall down into the glass rather than pull away by the ring.Tags: Force, Inertia
April 4th, 2009Inertia
I will pressume everyone of you have taken a bus. If you have not ride on a bus before, go out there and enjoy!
So what happen when a motionless bus started to move forward, you move backwords.
When a stop suddenly, you move forwards.
This is exspecially true when you are standing on the bus. If you wanna relive experience this, ask adults to accompany you to take a bus ride.
You will be asking me what is all this bus thing got to do with Inertia.
Ok. All object in the world (car, bike, bus, pens, you, your friend and many more) will continue moving (in motion) unless something stops them.
Again, all object is the world will continue stopping (not moving) unless something moves them.
But, objects being objects (verbs) will refuse/resist/object to start moving or stopping. The bahavior of the objects are known as Inertia.
That’s is why Newton’s first law of motion a.k.a Law of Inertia states:-
An object tends to stay at rest and a moving object tends to continue moving with same speed and in same direction unless being acted by an external force(this is the something I mentioned just now).
March 7th, 2009Force
Kids, try recall this… You wake up in the morning and go to kitchen for breakfast. Eggs are on the table and you always yell to your mum asking which is cooked ? Sounds familiar…?
Now, I gonna tell your a trick to differentiate the cooked (hard boiled) and the raw egg.
Well, the answer is fairly simple : SPIN IT!!!
The hard boiled egg is easy to spin and can be stoped instantly (with your fingers off course). The raw will be shaking around and can’t be spin at all but after you get it to spin, it will spin again after you have stopped it.
A hard boiled eggs is cooked and it is solid inside which means the egg white and egg yolk is in solid form. While, the raw egg is uncooked and there is liquid floating around in the egg.
Kids, concept here is Inertia!!! (will discuss more in later post)
Inertia cause the yolk in the uncooked egg to spin slowly or can’t start spinning when we try spin it. Later when we want to stop it from spinning, the moving liquid in the egg keep on spinning making it spinning again if we move our fingers away.
As for the cooked egg, the solid inside the egg spins together with the shell. Thus, we have little problem in spinning it.
So, no more Hard Boiled Egg vs Raw Egg every morning!Tags: Force, Inertia