Question

2. Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m back to point C in another 1 minute. What are Joseph's average speeds and velocities in jogging (a) from A to B and (b) from A to C? 3. Abdul, while driving to school, computes the average speed for his 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? 4. Amotorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 m s2 for 8.0 s. How far does the boat travel during this time? A driver of a car travelling at 52 km h applies the brakes and accelerates uniformly in the opposite direction. The car stops in 5 s. Another driver going at 3 km h in another car applies his brakes slowly and stops in 10 s. On the same granh monet​

Answer 1

It is given that Joseph jogs on a straight road of 300m in a time interval of 2 minutes and 30 seconds, which is equal to 150seconds. Therefore, when Joseph jogs from point A to point B, he covers a distance of 300m in time of 150seconds. Hence, his average speed is 300m150s=2ms−1.

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Answer 2

Answer:

(a) It is given that Joseph jogs on a straight road of 300m in a time interval of 2 minutes and 30 seconds, which is equal to 150seconds. Therefore, when Joseph jogs from point A to point B, he covers a distance of 300m in time of 150seconds. Hence, his average speed is 300m150s=2ms−1.

Explanation:

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