In the first 10s of a body’s motion, the velocity changes from 10 m/s to 20m/s. During the next 30s the velocity changes from 20m/s to 50m/s. What is the average acceleration in m/s2?

In the first 10s of a body’s motion, the velocity changes from 10 m/s to 20m/s. During the next 30s the velocity changes from 20m/s to 50m/s. What is the average acceleration in m/s2? Correct Answer 1

Average acceleration is the total change in velocity by the total change in time. Here, total change in velocity = 50-10 = 40m/s, and total change in time = 30+10 =40s. Therefore, average acceleration = 1 m/s2.
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