NCERT Exercise 2.10 - Motion in a Straight Line
Question: A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km h?�. Finding the market closed, he instantly turns and walks back home with a speed of 7.5 km h?�. Find (a) magnitude of average velocity and (b) average speed over: (i) 0 to 30 min, (ii) 0 to 50 min, (iii) 0 to 40 min.
Answer: (i) |v?| = 5, speed = 5; (ii) |v?| = 0, speed = 6 km/h; (iii) |v?| = 1.875, speed = 5.625 km/h (all km/h).
Full step-by-step NCERT solution with diagrams on Something by Zero.