Question

A particle moves in a straight line. Its speed increases linearly with time

Answer 1

Such motion is called uniformly accelerated motion.....

Answer 2

Explanation:

Speed is the rate of change of distance with respect to time. The distance is the path length. The path can be straight, circular, parabolic or whatever continuous function you can imagine. If the rate of change of distance is constant for whatever type of path chosen, then its speed is uniform.