# Work energy and power worked examples pdf

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In physics we say that work is done on an object when you transfer energy to that object. If one object transfers gives energy to a second object, then the first object does work on the second object. Work is the application of a force over a distance. Lifting a weight from the ground and putting it on a shelf is a good example of work. The simplest case of mechanical work is when an object is standing still and we force it to move.

Give an example of something we think of as work in everyday circumstances that is not work in the scientific sense. Is energy transferred or changed in form in your example? If so, explain how this is accomplished without doing work. Give an example of a situation in which there is a force and a displacement, but the force does no work. Explain why it does no work. Describe a situation in which a force is exerted for a long time but does no work. The person in Figure does work on the lawn mower.

When the force is constant, the work done is defined as the product of the force and distance moved. Worked Example 3. Find the work done in raising kg of water through a vertical distance of 3m. Work done by a variable force Forces in practice will often vary. In these cases Equation 3. Consider the case where the force varies as in Figure 3. ## JEE Main Work, Energy and Power Revision Notes ## Work energy and power worked examples pdf

In c there is no work being done since the direction of the force is perpendicular to the. Work, energy and power is a topic which comprise of three concepts which are very closely. The work done by a resultant force is equal to the change in kinetic energy that it produces. Workenergy theorem work, energy and power siyavula. Brown physics textbooks introductory physics i and ii a lecture note style textbook series intended to support the teaching of introductory physics, with calculus, at a level suitable for duke undergraduates.

State carefully if the following quantities are positive or negative: a work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket. Compute the a work done by the applied force in 10 s, b work done by friction in 10 s, c work done by the net force on the body in 10 s, d change in kinetic energy of the body in 10 s, and interpret your results. The total energy of the particle is indicated by a cross on the ordinate axis. In each case, specify the regions, if any, in which the particle cannot be found for the given energy. ### Work, Energy and Power

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Click the button below to download the full Physics Form 3 Notes pdf document, with all the topics. This is the most affordable option. HTML code is not allowed. Join our telegram group Download Notes. Share via Whatsapp. Be the first to comment! Download PDF for future reference Install our android app for easier access Click the button below to download the full Physics Form 3 Notes pdf document, with all the topics.

To understand how sustainable technologies work, it is important to grasp certain basic principles. To know how photovoltaic cells convert solar energy to electricity means understanding the fundamentals of electricity and light. Comprehending how wind turbines make electricity means understanding something about power, work, and electromagnetism. This unit will introduce the basic concepts needed to understand the technologies discussed in this course. While formulas will be used sometimes to help explain the fundamental principles, the point is not to be able to solve quantitative problems.

Work (definition). • Examples of work. • Work and Kinetic Energy. • Conservative and non-conservative forces. • Work and Potential Energy. • Conservation of.

#### Work, Energy and Power: Problem Set

The notes on the work power and energy are given below. The basic theorem for work, power and energy can be defined as the difference between two kinetic energies obtained by a single object by the change of force. It can be written as,. The definition of Power can be explained below:. Power has different types of physical forms.

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