Multiple choice question XXXIV — task. Science CBSE, Class 9.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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A bomb of mass

$1\ kg$ is thrown vertically upwards with a speed of

$100\ ms^{-1}$ . After

$5\ seconds$ , it explodes into two fragments. One fragment of mass

$400\ gram$ is found to go down with a speed of

$25\ ms^{-1}$ . What will happen to the second fragment just after the explosion? (

$g\ =\ 10\ ms^{-2}$ )

it will go upwards with speed $100\ ms^{-1}$
it will go upwards with speed $40\ ms^{-1}$
it will go upwards with speed $60\ ms^{-1}$
it will go downwards with speed $40\ ms^{-1}$

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