A bullet emerges from a barrel of length 1.2 m with a speed of 640 ms⁻¹. Assuming constant acceleration, the approximate time that it spends in the barrel after the gun is fired is

Options

(a) 4 ms
(b) 40 ms
(c) 400 µs
(d) 1 s

Correct Answer:

4 ms

Explanation:

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