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 1

Explanation:

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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