Difference between Uniform and NonUniform MotionA ball cannot change its position on its own or unless we apply force on the ball. The ball will move or change its position only when we apply force on it. This change in the position of any object is called motion. For example, a boy sitting on a bicycle. Here the cycle is in rest and will remain in the rest position until the force is applied on the foot pedal. When the boy applies force on the pedal, the cycle will start moving or there will be a change in the position of the bicycle. To understand motion in a better way, you have to first understand speed, distance, velocity, which are described as follows; Speed: Speed is a distance of an object covered in a given amount of time. It basically tells how fast something travels whether it be an object or person. To find the speed, we require time and distance. Similarly, we can find the distance if speed and time are given. Speed offers only the magnitude, and we called it scalar quantity in physics. Speed does not specify the direction. It just tells us how much area is covered in unit time without considering the direction of travel in which direction the object moves.
Velocity: Velocity is like speed but here we have to specify the direction in which an object is moving. We can say that it is the rate of change of position per unit time or displacement per unit time.
Uniform MotionWhen an object covers equal distance in equal intervals of time, it is called uniform motion. Consider a car or bike is covering 15 km in 15 minutes and the next 15 km in 15 minutes and so on, so, it is called uniform motion. Cases of uniform motion:
Uniform circular motionWhen an object is moving in circles at uniform Speed, it is called uniform circular motion. An example of a uniform circular motion is the fan. When you switch on the fan and give some time to the fan to reach its fixed speed then the fan is showing uniform circular motion. So the motion of the fan is a uniform circular motion. In that, velocity is not constant as speed is constant, but the direction is not constant or it keeps changing. Similarly, when you are walking around the room in a circle, your direction is changing all the time. That's why velocity is not uniform or constant. How to calculate the speed of uniform circular motionWe know speed is the distance by time. Let's see the body takes 't' seconds to complete one full circle. So the distance travelled here is the circumference of the circle, which is 2πr, where r is the radius. So, Speed = (2πr)/t Nonuniform MotionIt is a motion in which unequal distance is covered in equal intervals of time. For example, a car covers the distance of 20 km in 10 minutes and then it covers 10 km in the next 10 minutes then it is showing nonuniform motion as the car covers uneven distances in equal time intervals. So, when an object covers the uneven distances in the same amount of time, it is called nonuniform motion. Three cases of nonuniform motion:
Nonuniform circular motion:If the speed of the particle keeps changing while revolving in a circle, it is known as nonuniform circular motion. During the nonuniform circular motion of a particle, both the particle's speed and angular velocity are changed. Difference between Uniform and NonUniform Motion
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