Answer:
Similarities between speed and velocity
*Both are physical quantities, so both can be measured and quantified.
*Both the terms (speed and velocity) are associated with moving body only; not with static body.
*Both have same unit of measurement—m/s in SI and cm/s in CGS. Dimension is also same for both the physical quantities, which is [L T–1].
*Both could be either uniform or non-uniform; that means uniform speed, uniform velocity, non-uniform speed and non-uniform velocity—all are possible.
Differences between speed and velocity
SPEED:
* Distance traveled by a moving body per unit time is called speed
* Speed is a scalar quantity. So it has only magnitude but no specific direction.
* Average speed of a moving body can never be zero.
* Speed of a moving body can never be negative. It always has a finite positive value.
* A moving body having uniform velocity must have uniform speed.
* Speed of a body cannot be resolved; in fact, it always has same value irrespective of measured direction.
* While specifying speed of a body, only value with unit is sufficient.
VELOCITY:
* While specifying speed of a body, only value with unit is sufficient.
* While specifying speed of a body, only value with unit is sufficient.
* Average velocity of a moving body can be zero because of the algebraic summation.
* Velocity of a moving body can be negative based on the measured direction.
* A moving body having uniform speed may not necessarily have uniform velocity.
* Velocity of a body can be resolved in two mutually perpendicular directions using sine or cosine of adjacent angle.
* While specifying velocity of body, the direction must be specified along with the value and unit.
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