Answer: Slowing down.
- A Slowing down
- B Moving at constant speed
- C At rest
- D Speeding up
Correct answer: A. Slowing down
Explanation: When acceleration opposes the direction of motion (velocity positive, acceleration negative), the speed decreases; the body is slowing down.
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.