Questions
A sand bag of mass ‘m’ is suspended from a long string. A bullet of mass moving with a horizontal velocity ‘V’ strikes it and gets embedded into it. Calculate the velocity gained by the bag in this process. Also calculate the fraction of energy lost in this process
detailed solution
Correct option is D
Mass of sand bagm1=m Mass of bullet m1=m20horizontal velocity =‘V’from law of conservation of momentumm20V=(m1+m2)V'⇒V'=V21The fraction of energy lostKEi−KEfKEi=m1m1+m2=mm+m20=2021Talk to our academic expert!
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