Draw speed-time graph for a body
(a) in uniform motion
(b) in uniformly accelerated motion
(c) in uniformly retarded motion
(d) in non- uniformly accelerated motion.
Answers
Explanation:
1-Uniform motion along a line is the very special kind of motion that occurs when an object moves with unvarying speed in a fixed direction. During a fixed period of time, such as one second, an object in uniform motion will always cover the same distance, no matter when the period begins.
2-Uniform circular motion is accelerated because the velocity changes due to continuous change in the direction of motion. ... Thus, for a body moving in a circular path at a constant speed, its velocity changes continuously. The change in velocity gives rise to an acceleration in the moving body.
3-For a uniformly retarded motion, retardation( and hence acceleration) is a non-zero constant. Since slope of velocity-time graph is equal to acceleration, it can be concluded that slope of velocity-time graph is a non-zero constant. Hence, the velocity-time graph is a straight line inclined to the time axis.
4- Non-uniform acceleration constitutes the most general description of motion. It refers to variation in the rate of change in velocity. Simply put, it means that acceleration changes during motion. This variation can be expressed either in terms of position (x) or time (t).
