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speed
(1)speed can never be zero
(2) speed is the time rate at which an object is moving alone a path
(3) the SI unit of speed is meter per second
(4) speed is the rate of change of distance in scalar quantity
velocity
(1) velocity can be positive, negative and also zero
(2) velocity is the rate and direction of an object movement
(3) the SI unit of speed is also meter per second
(4) velocity is the speed of a body in a specific direction and is the rate of change of displacement
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