The equation for the speed of the body is: vx (t) = 3-5t. Determine the projection of the initial velocity vector.

Let’s go to scalar form. In scalar form, this equation is the equation of equidistant motion, where a = -5m / s ^ 2, V0 = 3m / s.
Therefore, the projection of the velocity vector is also positive and equal to 3m / s.

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