Question

derivation of first equation of motion

Answer 1

The First Equation of Motion. Consider an object moving so that its velocity-time graph is a straight line. Such an object is undergoing constant acceleration, since the slope of the graph is constant. The first equation of motion gives the final velocity after a time t for these objects, given an initial velocity v0 .

Answer 2

we know that-
                                 a=v-u/t
                                     hence- v-u=at
                                                v=u+at