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Examples of Uniform Linear Motion
We will first describe the definition of motion before moving on to the examples of uniform linear motion and its definition.Motion is when an object or body moves with respect to a particular point that we call as a reference point. Linear motion is when an object moves in a straight line. The path in which an object or a body is moving should be straight. Now this linear motion or the motion along the straight line can be in two ways – it can be uniform or it can be nonuniform. If it is uniform linear motion then the object or the body will be moving in a straight line and covering equal distances in equal intervals of time. This means that the speed of the body will be a constant. Now as the speed is constant it further implies that the body will not be experiencing any kind of acceleration. However the case of nonuniform linear motion is different. In this kind of motion the body will be moving in a straight path or line but will experience acceleration. This means that it will move with different speed during intervals of time or it will be covering more or less distance in subsequent equal intervals of time.
Let us now take a few examples of uniform linear motion. Consider a car moving on a straight road. Consider that the car covers 40 kms in first 1 hour, 40 kms in the next one hour and 40 kms in the upcoming one hour. This will be an example of uniform linear motion as the speed is constant and hence there is no acceleration. This is because the car covers equal distances in equal intervals of time.
Consider a person walking on a straight footpath. The person covers 1 kilometer in half an hour and 2 kilometers in the next half hour. Now this will not be uniform linear motion. This will be nonuniform linear motion because although the person is moving in a straight line however his speed is not constant. So if there is no external agent which influences the speed of a moving body the body will hence continue to be in the state of motion with the constant speed. However this does not happen because we have free agents like force of friction which come in to play during such phenomena.
Consider a boy running a race of 800 meters. This boy completes the first lap of this race in three minutes. Now the path is straight and after every 400 meter the person hands over the baton to another person. So let us assume that in the 800 meters race the race is completed in 6 minutes. So this is an example of uniform linear motion as the time taken to complete both the 400 meter distances is constant and hence the speed can be considered constant. As the speed is constant we do not have any acceleration and so this is uniform linear motion.