kinetic energy class 9 | potential energy class 9 | energy | 9th class physics city | matric part 1 скачать в хорошем качестве

kinetic energy class 9 | potential energy class 9 | energy | 9th class physics city | matric part 1

kinetic energy class 9 | potential energy class 9 | energy | 9th class physics city ch 6 | matric part 1 | 9th class physicscity ENERGY The energy is an important and fundamental concept in science. It links almost all the natural phenomena. When we say that a body has energy, we mean that it has the ability to do work. Water running down the stream has the ability to do work, so it possesses energy. The energy of running water can be used to run water mills or water turbines. Energy exists in various forms such as mechanical energy, heat energy, light energy, sound energy, electrical energy, chemical energy and nuclear energy etc. Energy can be transformed from one form into another. A body possesses energy if it is capable to do work. Mechanical energy possessed by a body is of two types: kinetic energy and potential energy. 6.3 KINETIC ENERGY Moving air is called wind. We can use wind energy for doing various things. It drives windmills and pushes sailing boats. Similarly, moving water in a river can carry wooden logs through large distances a can also be used to drive turbines for generating electricity. Thus a moving body has kinetic energy, because it can do work due to its motion. The body stops moving as soon as all of its kinetic energy is used up. The energy possessed by a body due to its motion is called its kinetic energy. Consider a body of mass m moving with velocity v. The body stops after moving through some distance S due to some opposing force such as force of friction acting on it. The body possesses kinetic energy and is capable to do work against opposing force F until all of its kinetic energy is used up. K.E. of the body = Work done by it due to motion Since motion is opposed, hence, a is negative. Using 3rd equation of motion: Equation 6.5 gives the K.E possessed by a POTENTIAL ENERGY Often a body has the ability to do work although it is at rest. For example, an apple on a tree is capable to do work as it falls. Thus, it possesses energy due to its position. The kind of energy which a body possesses due to its position is called its potential energy. The energy possessed by a body due to its position is known as its potential energy. Stored water possesses potential energy due to its height. A hammer raised up to some height has the ability to do work because it possesses potential energy. A stretched bow has potential energy due to its stretched position. When released, the stored energy of the bow pushes the arrow out of it. The energy present in the stretched bow is called elastic potential energy. The potential energy possessed by a hammer is due to its height. The energy present in a body due to its height is called gravitational potential energy. Let a body of mass m be raised up through height h from the ground. The body will acquire potential energy. related searches 1. Kinetic energy 2. Kinetic energy in urdu 3. Kinetic energy in hindi 4. Kinetic energy class 9 5. Kinetic energy 9 class physics 6. Kinetic energy 9th class physics 7. Kinetic energy sabaq 8. Kinetic energy ilm ki 9. Kinetic energy derivation 10. Kinetic energy mathematical derivation 11. Kinetic energy definition #KineticEnergy #K.E #class9 #9thphysics #matricPart1Physics #potentialEnergy #physics #urdu #hindi #energy #atifahmadofficial