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Work W=60×5=300J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 300 J. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.
Ref: NCERT Class 11 Physics > Chapter 6: Work, Energy and Power > Topic: Collisions and Power
Initial Ki=12×10×12=5J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 9 m/s. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics > Chapter 6: Work, Energy and Power > Topic: Collisions and Power
Work W=20×6=120J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 7 m/s. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.
Ref: NCERT Class 11 Physics > Chapter 6: Work, Energy and Power > Topic: Work, Energy and Power - Work-Energy Theorem
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