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Statement of a problem № 11165

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Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 5.0-kg projectile from rest to a speed of 4.0 × 103 m/s. The net force accelerating the projectile is 4.9 × 105 N. How much time is required for the projectile to come up to speed?




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