The equation 7(t) = (4 + t) i + (r² – 5) j + (7t) k gives the position of a particle in space at time t. Find the particle's velocity and acceleration vectors at time t. Then find the particle's speed and direction at time t = 4. ü(t) = a(t) = Speed at time t = 4 is Direction at time t = 4 is

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Projectile Motion