Question

Which of the following are examples of non-uniform motion along a straight line?
(A). Horse pulling a cart
(B). Brakes applied on a fast moving car
(C). Train on a straight bridge
(D). All of the above

Answer 1

- Hint: As the word suggests non uniform means which is not same, So non-uniform motion along a straight line is a one-dimensional motion in which velocity is not same throughout the distance.

Complete step-by-step solution -
If the velocity of a body changes, there should be a non-zero acceleration. The system of a horse pulling a cart may be uniform if the velocity does not increase or decrease. The same is true for a train moving on a straight bridge.
If brakes are applied on a car, it decelerates causing a decrease in the velocity. Brakes cause a car to slow down. Hence, this system is an example of a non-uniform motion.
Therefore, the correct choice is: (B) Brakes applied on a fast moving car

Note: In a non-uniform motion, the acceleration may be constant or varying. In both cases, the velocity changes with time and position. If we draw a distance time graph for a non uniform motion we will see that there will be no straight line. It may be curved in shape.