A ball is in free fall. Its acceleration is:
Correct answer: A. Downward during both ascent and descent
- A. Downward during both ascent and descent
- B. Downward during ascent and upward during descent
- C. Upward during ascent and downward during descent
- D. Upward during both ascent and descent
Explanation
Gravity provides a constant downward acceleration (g) at all times during free fall, whether the ball is moving upward, instantaneously at top, or descending.
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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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