Laws Of Motion

Uniform motion refers to motion where the object covers equal distances in equal intervals of time. In a graph representing uniform motion, the distance should increase linearly with time. The following explanations apply to each option:
- Option (A) and Option (B): Both represent linear increase in distance with time. These are valid representations of uniform motion, as the object is covering equal distances in equal intervals of time.
- Option (C): This option represents a non-linear increase in distance, which indicates varying speeds and is not uniform motion. The object is accelerating or decelerating in this case.
- Option (D): Represents constant decrease in distance with time, which would indicate motion in the reverse direction, but still a uniform motion as long as the speed is constant.
Thus, the correct answer is Option (C) because it is not a valid representation of uniform motion.

Let the force applied on A be , and the masses of A and B be and , respectively.
The total mass of the system is: Now, the acceleration of the system is given by: The force on A, which is exerted on B, can be calculated using Newton's second law for the body B: Thus, the force on A applied to B is .