Question

diff. between mass & weigh? and speed &velocity

Answer 1

Mass is the amount of matter present in body whereas weight is the force by which body is attracted towards the earth.Mass is scalar quantity but weight is a vector quantity
Speed ia the rate of change of distance per unit time but velocity is rate of change of displacement per unit time.

Answer 2

Answer:

$\huge \textbf{ \underline \color{deeppink}{AnswEr}}$

Mass is a property of matter. The mass of an object is the same everywhere. Weight depends on the effect of gravity. Weight increases or decreases with higher or lower gravity.

Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. Put another way, speed is a scalar value, while velocity is a vector.