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PART - 1 CH - 4 Laws of Motion — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsPART - 1 CH - 4 Laws of Motion2 Marks
Question
State the law of conservation of momentum:
✓

Answer

  Law of conservation of momentum :
According to Newton's second law, if
$\overrightarrow{F_1}$ is the total external force on any object or system then its rate of change is as follows
$\frac{d \overrightarrow{P}}{d t}=\overrightarrow{F}$
If total external force on system is zero then
$\frac{d \overrightarrow{P}}{d t}=0 \text { or } \overrightarrow{P}=\text { Constant }$
Therefore, if total external force on any system or object is zero then the momentum of that system remain unchanged in magnitude and direction. This is called the law of conservation of linear momentum

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