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1. Abdul, while driving to school, computes the average speed forhis trip to be 20 km/h . On his return trip along the same route, there is less traffic and the average speed is 30 km/h . What is the average speed for Abdul’s trip? 2. Velocity time graph of a body is shown in the figure. What are initial and final velocities of the body?3. A train travels the first 15 km at a uniform speed of 30 km/h, the next 75 km at a uniform speed of 50 km/h and the last 10 km at a uniform speed of 20 km/h. Calculate the average speed for the entire journey?4. The distance between Delhi and Agra is 200km.A train travels the first 100km at a speed of 50km/h. How fast must the train travel the next 100km,so as to average 70km/h for the whole journey? |
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Answer» sjejejdnxjddhdjddhj nfbfhdhdhddh |
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