Answer: g, directed downward.
- A g, directed downward
- B exactly zero
- C directed upward
- D continuously variable
Correct answer: A. g, directed downward
Explanation: A freely falling body accelerates downward at g ≈ 9.8 m/s².
On a velocity-time graph for uniform acceleration, the slope of the line gives the acceleration and the shaded area under the line gives the displacement.
Concept context
Equations of motion, projectile motion, relative velocity. Foundation of all mechanics.