Question

A body travels from A to B in 10 second with a speed of 50 km/h and returns with a speed of 100 km/h in 5 sec. The average speed and the average velocity for the whole journey is

Answer 1

Answer:

Avg. speed = 8.3 m/s, Avg. Velocity = 2.78 m/s

Explanation:

T1 = 10sec , T2 = 5sec, v1 = 50 x 5/18 = 13.8 m/s, v2= 100 x 5/18 = 27.7 m/s

Avg. Speed = v1 + v2 / t2 - t1

= 41.5/ 5 = 8.3 m/s

Avg. Velocity = v2 - v1/ t2 - t1

= 27.7 - 13.8 / 5 = 2.78 m/s