Definition Of Velocity

One of the basic entities of physics is velocity. Velocity shows the speed at which an object is traveling in a particular direction. This is a vector physical quantity because it has both magnitude (speed) and direction.

Velocity is the speed with which an object changes its position; the speed of the object in movement, along with the direction in which it travels.

The Formula for Velocity

It is represented by V and is expressed as

   v=st

Where,

• s = displacement

• t= time taken

As displacement is taken in meter and time taken in second. So, velocity is taken in meter/second or m/s.

We can work out the value of one missing quantity if any of these two quantities are given in any numerical by making use of this formula.

Solved Problems

The following are the velocity-based problems that will give you further insight into it.

Example 1:

 A plane travels a distance of 500 Km in 1 hr. What is its velocity?

 Answer: 

             Distance traveled S = 500 km = 500 × 103 m,

             Time taken  t = 1 hr = 60 × 60 = 3600 s.

Example 2:

 A submarine descends 150 ft in 3 seconds. Find the Velocity of a submarine?

Answer:

             Distance traveled  S = – 150 ft,

             Time taken t = 3 seconds

           

Velocity is essential in the solution of most problems in physics, and for understanding how things move around. And once you get the hang of applying this formula for velocity, alongside practice in various problems, you will feel that you are well prepared for more complex concepts involving motion.

 

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