Question
A body goes from C to D with a velocity of 20ms−1 and comes back from D to C with a velocity of 30ms−1. The average velocity of the body during the whole journey is:
Answer: Option B
:
B
Given:
Initial velocity, u=20ms−1
Final velocity, v=−30ms−1
Final point of motion is the same as the initial point of motion.
As the body comes back to the initial position, the total displacement is 0.
Velocity is defined as the rate of change of displacement.
Therefore, average velocity is 0.
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:
B
Given:
Initial velocity, u=20ms−1
Final velocity, v=−30ms−1
Final point of motion is the same as the initial point of motion.
As the body comes back to the initial position, the total displacement is 0.
Velocity is defined as the rate of change of displacement.
Therefore, average velocity is 0.
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