a Shell of mass 3kg is dropped from some height after falling freely for 2 seconds it explodes into two fragments of masses 2 kg anf 1 kg kinetic energy provoded by the explosion is 300 J using g=10 m|s calculate velocities of the fragment justify your answer if you have more than one option ?
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QUESTION
a Shell of mass 3kg is dropped from some height after falling freely for 2 seconds it explodes into two fragments of masses 2 kg anf 1 kg kinetic energy provoded by the explosion is 300 J using g=10 m|s calculate velocities of the fragment justify your answer if you have more than one option ?
ANSWER:)
Here, the body has kinetic energy as it has not mentioned that it touched the ground.
Now,
Kinetic Energy=1/2×mv²
Now, Dividing it in 2 ratios....REFER TO ATTACHMENT
After dividing IT we get 200 J AND 100 J .
Now ATQ
1/2×2kg×v²=200J
v=_/200J
Now Equation 2
1/2×1kg×v²=100J
v=_/100J
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