MCQ
Action and reaction forces never balance out. Because,
- AThey are equal but not opposite always
- BThey are unequal in magnitude even though opposite in direction
- CThey act on different bodies
- DThey are unequal in magnitudes
Explanation:
Action and reaction exist in pair and are always equal in magnitude and opposite in direction.But they act on different bodies, hence they cannot balance each other.
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Cardiac muscle fibres are: