Question

HELLO



PLZ GIVE ME SOME POINTS OF DIFFERENCE BETWEEN VELOCITY AND SPEED

Answer 1

ANSWER

They are completely different . Firstly you should have knowledge of distance and displacement.

Distance -

It is actual distance between initial and final points.

Displacement -

It is shortest distance between two initial and final points.

Distance is scalar quantity while displacement is vector .

Attachement 1

Now ,

What is scalar and vector ?

Scalar quantity is that which has only magnitude .

While ,

Vector quantity is that which has both magnitude and direction.

Sometimes distance and displacement are equal when an object is travelling in straight line jn same direction.

NOW COME TO YOUR QUESTION

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SPEED -

It is defined as the distance per unit time .

It is a scalar quantity.

Its unit is m/s

It can not be negative

VELOCITY -

It is defined as the displacement per unit time .

Its unit is m/s

It can be zero and negative .

NOW SEE ,

HERE VELOCITY IS NEGATIVE

see ATTACHMENT 2

A body moves 2 m in south in relation to north displacement =-2 m. Let the object take 1 sec to cover the distance So velocity is also -2 m/s .

So velocity can be negative but not speed .

Answer 2

1. Answer :  SPEED:   1. Distance covered by body per unit time.  2. Speed = distance/Time. 3. It is a scaler quantity. 4. SI units = m/s.  VELOCITY: 1. Distance covered in one direction per unit time. 2. Velocity = Displacement/Time. 3. It is a vector quantity. 4. SI units = m/s.