Question

The displacement –time graphs of an object moving along the X-axis in straight line with
a positive slope ,the object has a A. Steady increasing velocity B. Constant displacement C.
Constant acceleration D. constant positive velocity (Acceleration = 0.)

Answer 1

Correct answer: D.

Reason: On an x–t graph the slope = velocity. A straight line with positive slope means the slope (velocity) is constant and positive, so the object moves with constant positive velocity and acceleration = 0.

Why others are wrong:
- A (steady increasing velocity): would require the slope to increase with time (a curve getting steeper), not a straight line.
- B (constant displacement): would be a horizontal line (zero slope).
- C (constant acceleration): gives a parabolic x–t curve, not a straight line.