Question

Which of the following is the example of uniform motion?
a. Free Falling body
b. The motion of the moon around the earth
c. A car moving with constant velocity
d. None of the above

Answer 1

- Hint: Uniform motion is a non-accelerated motion and non- uniform motion is accelerated motion. Find out the difference between these two terms, then analyze all the options separately using the definitions of uniform and non-uniform motion and get the answer.

Complete step-by-step solution -
Uniform Motion: In simple words, defined as the motion of a body covering the equal distance in equal interval of time. This can be seen as a straight line in the distance-time graph, as represented below. The body in uniform motion must have a constant velocity that also means zero acceleration.

Non-Uniform Motion: In simple words defined as the motion of a body covering the unequal distance in an equal interval of time. This can be seen as a non-straight line in the distance-time graph is represented below. The body in uniform motion must have a variable velocity that also means non-zero acceleration.

In context to the question asked, we know that a free-falling body has a non-zero acceleration, and the motion of the moon is an example of circular motion, which is an accelerated motion. So we remain with the option c.

Note: Circular motion with a constant speed is an example of accelerated motion because the direction of movement keeps on changing.
Students should remember that the free falling body’s acceleration increases as it moves closer to the ground, so the velocity is not constant hence its not an uniform motion.