A body goes from A to B with a velocity of 20 m/s and comes back from B to A with a velocity of 30 m/s. What is the average velocity of the body?
To solve for the average velocity, apply the formula:
`v_(ave) = (Delta x)/ (Delta t)`
`v_(ave)` is the average velocity
`Delta x` is the displacement
`Delta t` is the time elapsed
In the problem, the body goes from A to B and then from B to A. Since the body returns to its original position, its displacement is zero.
Plugging in `Delta x = 0` to the formula yields,
`v_(ave) = 0/ (Delta t) =0`
Therefore, the average velocity of the body is 0 m/s.