Question

What is the difference between speed and velocity?

Answer 1

(i) Speed is defined as the distance travelled per unit time, while velocity is defined as the displacement per unit time.

(ii) Speed is a scalar quantity, while velocity is a vector quantity.

Velocity changes if direction changes but speed doesn't change if direction changes.

If a body doesn't change its direction then velocity - time and speed - time graphs will be similar.

SpeedVelocitySpeedisthedistancetravelledbyanobjectinagivenintervaloftimeVelocityisthedisplacementofanobjectinagivenintervaloftime.Speed=Distance/TimeVelocity=Displacement/TimeSpeedisascalarquantity,i.e.,ithasonlymagnitude.Velocityisavectorquantity,i.e.,ithasbothmagnitudeaswellasdirection.

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