Which best describes the difference between speed and velocity? a) velocity is instantaneous. b) speed is a vector quantity. c) speed includes rate of change and direction. d) velocity includes rate of change and direction.

Option (d) is correct.

Explanation:

Speed is defined as the ratio of distance traveled to the time taken.

As distance is scalar quantity, time is also scalar, so the speed is a scalar quantity.

Velocity is defined as the ratio of change in displacement to the time take.

Here displacement is a vector quantity, so velocity is a vector quantity.

So, velocity includes the rate of change of displacement and the direction.

explanation:

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