Q. A stone is accelerated upwards by a cord whose breaking strength is three times the weight of the stone. The maximum acceleration with which the stone can be moved up without breaking the cord is
A) $g$
B) 2$\ g$
C) 3$\ g$
D) 4$\ g$
Explanation
(b) $3mg = ma + ma$
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or $2mg = ma$ or $a = 2g$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.