When does the average velocity become zero?

How does the average velocity or the root mean square velocity of gas molecules depend on temperature and pressure?

By what factor does the average velocity of a gaseous molecule increases, when the temperature (tn Kelvin) is doubled ?

When is the average velocity of a particle equal to its instantaneous velocity?

Two particles, initially at rest due to their mutual attraction move towards each other. When their relative velocity becomes v , velocity of the centre of mass of the system becomes

What is the ratio of average velocity and root mean square velocity of the molecules of a gas?

Statement I : If the average velocity of a body is equal in two successive time intervals, its velocity is a constant. Statement II : When a body travels with constant velocity its displacement is proportional to time.