Question

A ball is moving along x-axis A quantity is measured to be - 20 m per second is it speed or velocity give a reason for your answer

Answer 1

ANSWER
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Since the ball is moving is moving "only" in x-axis, We can clearly conclude that the Ball is moving in a single direction i.e. it is having RECTILINEAR MOTION.

So, the quantity measured can be both velocity or speed bcoz in rectilinear motion speed and velocity are exactly same.

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HOPE IT HELPS :):):):):

Answer 2

$here \: is \: your \: answer \: bro$