Which of the following statements is true for a projectile launched vertically downward? a. Its y-component of velocity does not change its sign. b. Its y-component of velocity changes its sign and the x-component of velocity stays constant (and #0). c. Its velocity and acceleration are parallel. d. Its initial y-component of velocity is zero. e. Its x-component of velocity is zero.

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Scalars and Vectors

Scalars and Vectors are the classification of physical quantities that are used to denote various terms in physics.