An electric train is moving with a velocity of $120 \, km \, h^{-1}$. How much distance will it cover in $30 \, s$ (in $, km$)?

"The direction in which an object moves is given by the direction of velocity of the object and not by the direction of acceleration." Give an example to justify this statement.

State whether the following statement is true or false:
Velocity and speed are measured in different units.

What is the numerical ratio of average velocity to average speed of an object when it is moving along a straight path?

What is the relationship between the distance travelled and the time elapsed for motion with uniform velocity?

Define 'average speed'. An object moves with a uniform speed of $10\, m s^{-1}$ for $5\, s$ and then with a uniform speed of $5\, m s^{-1}$ for $10\, s$. Find its average speed.