Newton’s Three Laws. Sir Isaac Newton 1643-1727. Introduction. Newton’s 3 laws define some of the most fundamental things in physics including: Why things fall down Why objects move And much more!. First Law.
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Sir Isaac Newton
Do you know what force acts on it to bring it back down to earth?
If it weren’t for this force, when you kicked a soccer ball it would never stop flying and never come back down to earth. That would be the longest kick ever!
Let’s try a couple problems!
You get this answer by plugging in the values.
You get this acceleration by plugging in the values.
Why do the elephant and
feather hit the ground at
the same time?
(assume no air resistance)
Look at the following example.
F=(100,000kg)(9.8 m/s²) F=(1kg)(9.8 m/s²)
F=980,000 N F=9.8 N
This means the elephant will hit the ground with a force 100,000 times bigger than the feather. That will definitely leave a mark!