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A high altitude, a body explodes at rest into two equal fragments with one fragment

A high altitude, a body explodes at rest into two equal fragments with one fragment receiving horizontal velocity of 10 m/s.Time taken by the two radius vectors connecting point of explosion of fragments to make 90° is

Options

(a) 10 s
(b) 4 s
(c) 2 s
(d) 1 s

Correct Answer:

2 s

Explanation:

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