Asmall projectile is fired vertically downward into a fluid medium with an initial velocity of 60 m/s. due to the drag resistance of the fluid the projectile experiences a deceleration of a (-0.4) m/s2, where v is in m/s. determine the projectile's velocity and position 4 s after it is fired.

Velocity after 4 seconds becomes

Explanation:

By definition of acceleration we have

It is given in our case that a =

Thus we have

Thus solving we get

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answer:

explanation:

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