MCQ
According to Newton’s third law –
- A$\overrightarrow{ F _{12}}=\overrightarrow{ F _{21}}$
- ✓$\overrightarrow{ F _{12}}=-\overrightarrow{ F _{21}}$
- C$F _{12}+ F _{21}=0$
- D$F _{12} x F _{21}=0$
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