A particle of mass 1 kg is thrown vertic...

A particle of mass 1 kg is thrown vertically upwards with speed 100 m/s. after 5 s, it explodes into two parts. One part of mass 300 g comes back with speed 24 m/s, What is the speed of other part just after explosion?

100 m/s upwards

600 m/s upwards

100 m/s downwards

800 m/s upwards

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