Question

What is Speed and Velocity ??​

Answer 1

The short answer is that velocity is the speed with a direction, while speed does not have a direction. Speed is a scalar quantity—it is the magnitude of the velocity. Speed is measured in units of distance divided by time (e.g., miles per hour, feet per second, meters per second, etc.).

Answer 2

$\bold{Answer}$

$\bold{SPEED}$

● Speed is defined as the distance travelled by the object in per unit time . It is a scalar quantity.

SI unit = m/s

CGS unit = cm/s

Dimensional formula = [M°L^1T^-1]

$\bold{SPEED}$ = Distance/Time

If an object travels , distance (s) in time (t) then the speed (v) is ..

V = S/T

• $\bold{Different\: types \: of\: Speed}$.

1. Uniform speed = An object is said to be moving with uniform speed , if it covers equal distance in equal time intervals.

2. Variable speed = An object is said to be moving with variable speed if it covers unequal distance in equal intervals of time.

3. Average speed = It is the ratio of the total distance travelled by the object to the total time taken.

4. Instantaneous speed = The speed of an object at a particular time instant is instantaneous speed.

$\bold{Velocity}$

● Velocity is the distance travelled by an object in specific direction in unit time is known as velocity. It is a vector quantity.

It is denoted by V.

SI unit = m/s

CGS unit = cm/s

Dimensional formula = [M°L^1T^-1]

Velocity = Displacement/Time

$\bold{Different\: types \: of\: velocity}$

1. Uniform velocity = An object is said to be moving with uniform velocity , if it covers equal Displacement in equal time intervals.

2. Variable velocity = An object is said to be moving with variable velocity if it covers unequal displacement in equal intervals of time.

3. Average velocity = It is the ratio of the total Displacement of the object to the total time taken.

4. Instantaneous velocity = The velocity of an object at a particular time instant is instantaneous velocity.