Web#9thClassPhysicsKineticEnergy #9thClassPhysicsMechanicalEnergy #9thClassPhysicsChapter6This lecture covers the topic Kinetic Energy of chapter 6 of 9th Class... WebJul 26, 2024 · SECTION I – OBJECTIVE. Two bodies of mass 1 kg and 4 kg possess equal momentum. The ratio of their K.E.: When you compress a spring you do work on it. The …
CHAPTER - 11 WORK AND ENERGY - SlideServe
WebJun 15, 2024 · Work = Force x Displacement Unit of workdone = Joule = Newton x metre 1 Joule work is said to be done when 1 Newton force is applied on an object and it shows the displacement by 1 meter. Energy. The capacity of a body to do work is called the energy of the body. Unit of energy = Joules 1KJ = 1000 J. WebDec 21, 2024 · Answer: Question: The work required to be done to stop a car of 2500 kg moving at a velocity of 90 km h–1 is. a. –781.25 kJ. b. 781.25 kJ. c. 2250 kJ. d. –2250 kJ. Answer: Question: Two bodies have their masses m1/m2 = 3 and their kinetic energies K.E1 K.E2 = 1/3The ratio of their velocities are. a. 1 : 1. pay water bill indio ca
Chapter 6: Heat and Energy Selina Solutions Concise Physics Class 9 …
The class 9 Chapter 11 Work and Energy discusses the concept of work, energy and power in detail. In day-to-day life, we consider any useful physical or mental labour as work. But work is defined differently in Science. Work done by a force acting on an object is equal to the magnitude of the force multiplied by the … See more Work done on an object is defined as the product of the magnitude of the force acting on the body and the displacement in the direction of the force. W = F.s. The SI unit of force is … See more Energy is defined as the ability to do work. Its unit is the same as that of work. Energy is a scalar quantity. SI unit of energy or work = Joule (Nm) or … See more Law of conservation of energy states that energy can neither be created nor destroyed, but can be transferred from one form to another. The total energy before and after the transformation remains constant. Total … See more Energy can get stored in an object when work is done on it. For example, stretching a rubber string. The energy that is possessed by a body by virtue of its configuration or … See more WebNov 23, 2024 · Important Questions of Work and Energy Class 9. Question. A body is falling from a height h. After it has fallen a height 2 X h, it will possess. (a) only potential energy. (b) only kinetic energy. (c) half potential and half kinetic energy. (d) more kinetic and less potential energy. Answer. WebAug 22, 2012 · CHAPTER - 11WORK AND ENERGY CLASS:- IX MADE BY :- MANAS MAHAJAN SCHOOL :- K.V. GANESHKHIND PUNE-7. 1) Work :-Work is said to be done when a force acts on an object and the … pay water bill margate fl