References AQA Work done, pages 18-21, 99, 170, GCSE Physics Student Book, Collins, AQA Work done, pages 32, 33, 135, 136, GCSE Combined Science Trilogy Physics, CGP, AQA Work done, pages 33, 34, 155, 156, GCSE Physics The Complete 9-1 Course for AQA, CGP, AQA Work done, pages 8-9, GCSE Physics Third Edition, Oxford University Press, AQA Edexcel Work done, pages 130, 195, 201, GCSE Physics, Pearson Edexcel Work done against friction, page 201, GCSE Physics, CGP, Edexcel Work done by brakes, page 52, GCSE Physics, CGP, Edexcel Work done by charges, pages 224, 242, GCSE Physics, CGP, Edexcel Work done by forces, pages 62, 63, 199, GCSE Physics, CGP, Edexcel Work done in stretching, page 325, GCSE Physics, CGP, Edexcel Work done on gases, page 312, GCSE Physics, CGP, Edexcel OCR Work done, pages 168. However you do need to remember the two equations which are combined to make this equation.Įquation 1 is substituted into equation 2 to give \( W = IVt\). NB: You do not need to remember this equation. T = The length of time that the current is flowing. V = The potential difference across the component. ![]() Work Done = (Current) x (Potential Difference) x (time) Equation for Work Done by a Forceĭ = The distance moved by the object in the direction of the force. Work Done by Electricity Work can also be done by an electrical current as the electrostatic field inside a wire provides a force to move the electrons (or ions). If the direction of the force and the motion of an object are perpendicular then no work is being done on the object by that force. Work done on a body is equal to the increase in the energy of the body, for work transfers energy to the body. Work Done by a Force Work Done by a force can only be calculated for objects moving in the direction of the force. Work Done on a SpringĪbout Work Done Work Done is measured in Joules. Work Done by Deformation When an object is deformed, such as a spring being stretched, work is done to transfer energy into its Elastic Potential Energy Store. The weight acts downwards but the movement was horizontal. ![]() No work has been done because the movement is not in the direction of the force. Calculate the work done by the brakes.Ī person carries a 20N box along a horizontal path of 20m.ĭistance moved in the direction of the force = 1.2mĭistance moved in the direction of the force = 15mĭistance moved in the direction of the force = 0m The car travels a distance of 15m braking. The brakes on a car apply a force of 10,000N. Calculate the work done by the person against gravity. Example Calculations A person lifts a 40N box by a height of 1.2m. Work Done = (Force) x (Distance moved in the direction of the force) If the direction of the force and the motion of an object are perpendicular then no work is being done on the object by that force. Work Done can only be calculated for objects moving in the direction of the force. ![]() Work Done is the amount of energy transferred by the action of a force.Ībout Work Done Work Done is measured in Joules.
0 Comments
Leave a Reply. |