a swimmer swims 20 lab in north south facing pool in 7 minute her first lab is towards north the displacement and average velocity are
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displacement and velocity
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The displacement and average velocity both will be zero.
Explanation:
A lab in a swimming pool means the length of the swimming pool from one end of the pool to the other side of the pool.
The swimmer swims 20 labs. Her first lab was towards the north and her second lab will be towards the south and she will return back from where she started. In this way, after completing 20 labs she will be at the same point where she started.
Displacement is a vector quantity and its length is the shortest distance from the initial to the final position.
So her displacement will be zero.
Velocity is the displacement divided by time.
And since her displacement is zero, her velocity will also be zero.
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