please help,8 year old sons homework,
2007-05-07 03:47:54 · 15 answers · asked by DEAN 2 in Science & Mathematics ➔ Physics
its harder to run through dry land lol.
2007-05-07 03:53:01 · answer #1 · answered by Anonymous · 0⤊ 1⤋
Ok so i'll put this quite simply as it's for your 8 year old son...
When you run on dry land you are simply running through air, which is a gas and therefore the particles are widely spread out.
When running in water you are running through a liquid so the particles are more tightly packed than in a gas.
This more dense packing of particles causes more friction as there are generally more particles 'in the way', this slows running down.
Hope this helps
Foxy
2007-05-07 04:02:26 · answer #2 · answered by Anonymous · 0⤊ 0⤋
It Is Harder Because:
Waters particles are closer to eachother where as air is a gas so it s particles are more far apart causing person to be able to run through it easily and for water it requires more power and it is harder.
Hope I Helped!!
P.S:I m 11 years old but I am a science geek!!!!
;)
2015-10-18 04:06:16 · answer #3 · answered by hyyat 1 · 0⤊ 0⤋
For your son:
When you run through air, you have to push the air out of the way with your body. Imagine a train or car wooshing past : you can feel the air being pushed around. Air is very light, and it moves around easily.
If you put your feet in the water and wave them about, you can see the water wooshing around. It's hard work to splash your feet for a long time. Water is heavier than air, and it's hard work moving it around.
When you are running in water up to your ankles, you have to splash the water to touch the beach underneath. Your foot is about the same size a big cup, so it's like splashing a cup of water every step. If the water is a little bit deeper, it might be up to your knees, you have to splash a lot more water. Every step you take, you have to move a bucket of water out of the way! Imagine if you were a deep sea diver trying to run - it would be really hard work. You would have to move a bathtub of water out of the way for every step.
2007-05-07 21:25:08 · answer #4 · answered by drift::words 2 · 0⤊ 0⤋
It is harder to run through water since the friction of water are greater than the friction of air on the body
2007-05-07 03:55:15 · answer #5 · answered by maussy 7 · 0⤊ 0⤋
Water has a higher density that air, therefore more resistance acts on you when you run through it. There is more friction and also, on dry land you have a bigger upthrust causing you to run more easily on it.
2007-05-07 04:40:02 · answer #6 · answered by Nelly-The-Elephant 2 · 0⤊ 0⤋
First of all Water is much much denser than air (molecules of water are closer to each other) . Density being 1000 kg\cubic metre.
secondly water being a denser fluid than air exerts more buoyancy force than air (yes air is also considered a fluid!! ).
hence it is more difficult to run through water than through air.
2007-05-07 04:03:57 · answer #7 · answered by venkat_the_great 2 · 0⤊ 0⤋
Water is has higher density and viscosity than air and thus has more resistance to a body moving through it
2007-05-07 03:53:36 · answer #8 · answered by Jason S 3 · 2⤊ 0⤋
the resistance of water is much grater than air, so you will find it harder to run fast in water
2007-05-07 04:27:31 · answer #9 · answered by fire fox 1 · 0⤊ 0⤋
More friction from water than air.
2007-05-07 04:39:29 · answer #10 · answered by Thomas 2 · 0⤊ 0⤋