Complete the sentences to describe the difference between speed and velocity.

Speed describes how fast an object moves. Speed is described by and time. Velocity is speed with. Velocity is described by and time.

a) Distance

b) Direction

c) Displacement

Explanation:

Speed is the distance covered in per unit time by an object or person. It is how fast an item is moving. speed does not have a direction. It is the ratio of distance covered and time taken.

Example: A car covered 100 km in 1 hour.

Its speed will be 200 km/h.

On the other hand, velocity has direction as well as magnitude in it so it is a vector quantity. Velocity is the ratio of displacement and time.

Example: A car moved 100 km in 1 hour southwards.

Its velocity will be 100 km/h (towards south).

Thus, the correct answer is:

a) Distance

b) Direction

c) Displacement