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The vertical component of velocity of a projectile:

Correct answer: A. Decreases during upward motion and increases during downward motion

  • A. Decreases during upward motion and increases during downward motion
  • B. Increases during upward motion and decreases during downward motion
  • C. Increases during both upward and downward motions
  • D. Decreases during both upward and downward motions

Explanation

The vertical component of velocity of a projectile decreases during upward motion because it is going against the gravitational pull, which causes a decrease in speed. It increases during downward motion as the projectile accelerates towards the ground under the influence of gravity. This change in velocity is a result of the constant acceleration due to gravity acting on the projectile throughout its trajectory. Therefore, the correct option is that the vertical component of velocity decreases during upward motion and increases during downward motion.

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About Force and Motion

Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.

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