Question

A force is always required to move a body uniformly. Comment?

Answer 1

Hint: A force may be defined as any push or pull applied to the body. Mathematically, force is defined as the product of mass and acceleration. Force is responsible for the motion of an object. For the movement of an object the force is applied in the direction, to which we want body to move, however iff opposite force is applied it acts as a resistance for the motion of the body and will be called as frictional force.

Complete step by step solution:
Motion is the change in the position of an object with respect to time. The motion may be uniform or non uniform.
A uniform motion is that condition of the body in which it covers equal distance in equal interval of time. Like a car is moving $5Km/h$ for the first $5$ minutes and in next $5$ minutes again moves with the speed of $5Km/h$ and so on, then this type of motion is said to be uniform motion.
A non uniform motion is that condition of the body in which it covers unequal distance in equal intervals of time. Like a car is moving $5Km/h$ for the first $5$ minutes and in next $5$ minutes again moves with the speed of $7Km/h$ and so the changes continue for next interval, then this type of motion is said to be non uniform motion.
For a body to be in uniform motion it is required to have an equal amount of force at each interval of time. The force may be in the direction of motion or in the opposite direction of motion.

Note:
To understand motion, one must go through with the basics of motion and the laws of motions given by Sir Isaac Newton. There are basically three laws of motions named as the law of inertia or the first law of motion, the law of momentum or the second law of motion and the law of action and reaction or the third law of motion.