A scalar quantity is a measurement with only a numeric value and not a direction. Time has only a numeric value and no direction and is therefore a scalar. Distance can be either. A distance of 10 metres in a scalar but 10 metres [due] East is a vector, i.e., Along East will be a positive displacement and along West will be negative.
But distance is always a positive value as there is no influence of direction.
similarly, You don't hear people say "It is -5:00 Am now as the hands moved the other way round." time, no matter what, is a positive quantity and it doesn't depend on direction at all.
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Shortest distance is called displacement . displacement =average velocity / average time . It is a vector quantity both has magnitude and direction.But,distance is a scalar quantity having only magnitude.
Speed (scalar quantity) measured in ms-1
vector, power= work/time and work= force * distance, force is vector.
A scalar quantity is something that has magnitude but no directional component. Examples of scalar quantities include time, mass, energy, speed, temperature, and volume.
Distance traveled by an object per unit of time is called speed. Speed is a scalar quantity. It is always greater than or equal to zero. Direction is not associated with this physical quantity. Speed at any instant is called instantaneous speed. Speedometer in vehicles show instantaneous speed viz. speed at any instant of time. Speed at any instant = derivative of traveled distance with respect to time = dx/dt.