Question

why s-t graph with uniform acceleration is a curve

Answer 1

since s=ut+ (at^2)/2. we can see that highest degree of t is 2.which means it's a quadratic equation,therefore it is a curve hyperbolic or parabolic

Answer 2

A straight line is a curve with constantslope. Since slope is acceleration on a velocity-time graph, each of the objects represented on this graph is moving with a constant acceleration. ... an object undergoing constant acceleration traces a straight line.(not sure)