Topic Content:
- Newton’s First Law of Motion
- Newton’s Second Law of Motion
- Third Law of Newton
Sir Isaac Newton studied the behaviour of bodies in motion and was able to come up with three laws governing motion and they are as follows:
Newton’s First Law of Motion:
A body will continue to be in a state of rest or of uniform motion unless it is acted upon by an external force.
Newton’s Second Law of Motion:
The time rate of change of momentum of a body is directly proportional to the applied force and this takes place in the direction of the force.
Therefore, \( \scriptsize F \propto \normalsize \frac{change \: in \: momentum}{time} \)
\( \scriptsize F \propto \normalsize \frac{mv \: – \: mu}{t} \) \( \scriptsize F \propto \normalsize \frac{m(v \: – \: u)}{t} \)Recall that a = \(\frac{final \: velocity\: – \: initial \: velocity}{time} \)
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