Question

028.(a) A train is travelling at a speed of 90 km/h. Brakes are applied so as to produce uniform retardation
of 0.5m/s^2. Find how far the train will go before it is brought to rest .
b) give one difference between speed and velocity
​

Answer 1

b. Speed, being a scalar quantity, is the rate at which an object covers distance. ... On the other hand, velocity is a vector quantity; it is direction-aware. Velocity is the rate at which the position changes. The average velocity is the displacement or position change (a vector quantity) per time ratio.