# Newton's Second Law of Motion and Gun Acceleration

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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 x 10^3 m/s^2. The net force accelerating the projectile is 4.9 x 10^5 N. How much time is required for the projectile to come up to speed?

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Solution. Denote the net force accelerating the projectile by F, denote the acceleration of the projectile by a, ...

#### Solution Summary

The solution shows how to calculate the time needed to accelerate to certain speed by using Newton's second law.

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