Answer: metre.
- A metre
- B metre per second
- C metre per second²
- D second
Correct answer: A. metre
Explanation: Although "per second" appears in the name, sₙ is a displacement, so its unit is the metre.
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.