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Q2.12: NCERT Physics - Part 1 MOTION IN A STRAIGHT LINE 2.12 Solution: Look at the graphs (a) to (d) (Fig. 2.10) carefully and state,…
⚠️ Common Exam Traps & Conceptual Pitfalls
Speed is the magnitude of velocity and must be non‑negative; a graph labelled speed versus time cannot show values below zero, so any negative region indicates the student has confused speed with signed velocity.
Look at the graphs (a) to (d) (Fig. 2.10) carefully and state, with reasons, which of these cannot possibly represent one-dimensional motion of a particle.
Step-by-Step Verified Solution
**Answer:** Graphs (a), (b), and (c) cannot represent one-dimensional motion.
**Step-by-Step Explanation:**
(a) The graph shows two positions at the same time, which is impossible.
(b) The graph shows negative speed, which is impossible.
(c) The graph shows a particle with two velocities at the same time, which is impossible. [citation:19]
(d) The graph is possible (speed vs time with varying acceleration).
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