NCERT Exercise 2.18 - Motion in a Straight Line
Question: Figure 2.15 gives a speed-time graph of a particle in motion along a constant direction. Three equal intervals of time are shown. In which interval is the average acceleration greatest in magnitude? In which is the average speed greatest? Give signs of v and a in the three intervals. What are the accelerations at points A, B, C and D?
Answer: Greatest : **Interval 1**; Greatest average speed: **Interval 2**.\nSigns of : **Positive** everywhere.\nSigns of average : **Positive** (Int 1), **Negative** (Int 2), **Positive** (Int 3).\nAccele...
Full step-by-step NCERT solution with diagrams on Something by Zero.