What is the numberical ratio of velocity to speed of an object ?

Which of the following are true ? (A) A body having constant speed can have varying velocity. (B) Position time graphs for two objects with zero relative velocity are parallel. (C) The numerical ratio of velocity, to speed of an object can never be more than one.

If the force applied on the object is in the direction of motion, the speed of the object .........

(a) Define velocity. What is the SI unit of velocity ? (b) What is the difference between speed and velocity ? (c ) Convert a speed of 54 km/h into m/s.

What is the ratio of RMS and average speed of oxygen molecule?

A woman throws an object of mass 500 g with a speed of 25 m s^(-1) . (a) What is the impulse imparted to the object ? (b) If the object hitts a wall and rebounds with the half the original speed , what is the change in momentum of the object ?