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Which of the following is/are NOT true about action reaction forces? (i) Action reaction forces are unequal in magnitude and always act in the same direction. (ii) Action reaction forces act on different bodies. (iii) Action reaction forces act on the same body.
Both (i) and (iii)
Only (ii)
Only (iii)
Both (i) and (ii)
Both (i) and (iii)
Remember Newton's Third Law: Action-reaction pairs act on two different bodies and are equal in magnitude but opposite in direction.
Remember Newton's Third Law: Action-reaction pairs act on two different bodies and are equal in magnitude but opposite in direction.
Analyze Statement (i)
Newton's Third Law states action and reaction forces are equal in magnitude and act in opposite directions. Statement (i) says they are unequal and act in the same direction, which is incorrect.
Analyze Statement (ii)
Newton's Third Law explicitly states that action and reaction forces must act on two different bodies. Therefore, statement (ii) is a true statement.
Analyze Statement (iii)
Since action-reaction forces always act on two different bodies, they cannot act on the same body. Therefore, statement (iii) is incorrect.
Consolidate Findings
The question asks which statements are NOT true. Statements (i) and (iii) are false. Statement (ii) is true.
B: Incorrect because statement (ii) is actually true. C: Incorrect because statement (i) is also false, not just (iii). D: Incorrect because statement (ii) is true, so it cannot be included in the 'not true' selection.
A is correct because statements (i) and (iii) contradict Newton's Third Law of motion, while statement (ii) accurately describes the law.
In physics-based reasoning, always verify if a concept requires 'one body' or 'two bodies' as this is the most common distractor in SSC/Railway exams.
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