Storage, conversion, transmission and radiation pdf 7. Give an example of something we think of as work in everyday circumstances that is not work in the scientific sense. Concepts of work, kinetic energy and potential energy are discussed. Energy, kinetic energy, work, dot product, and power. Class 11 physics revision notes for chapter 6 work, energy and power free pdf download. It is the rate of work done or rate of energy transfer. Unit 4 work, energy and momentum mr trasks physics. At maximum compression, the box has a speed of zero. Determine the compression of the spring such that the block just makes it to the top of the hill. In physics, work is and im going to use a lot of words and they actually end up being kind of circular in their definitions.
Me i me f o valid when there is no energy converted to heat, light or sound due to friction. Neet and aipmt neet physics work,energy and power mcq. Physclips ch 7 definition of work definition of kinetic energy. In physics, power is associated with energy and has a precise meaning. The energy possessed by an object is thus measured in terms of its capacity of doing work. Icse class 10 physics chapter 2 work, energy and power. Intro to the quantum, energy quantization pdf energy in chemical systems and processes, flow of co 2 pdf 4.
Work is done when a force is exerted on an object, and the object moves from one place to another. Work done is generally referred in relation to the force applied while. This implies that any object that possesses energy can do work. Class 11 physics revision notes for chapter 6 work. Holt physics work and energy free pdf file sharing. Work the document shown below can be downloaded and printed. In this article, we will learn all about the concept of work, power and energy. This collection of mcqs have been prepared by the best neet teachers in the country. Work and energy can be considered as two sides of the same coin. How much work is required to move it at constant speed. Home high school ap physics notes work, energy, and power. Work kinetic energy potential energy newtons universal law of gravitation great demos.
Using work and energy, we not only arrive at an answer, we see that the final kinetic energy is the sum of the initial kinetic energy and the net work done on the package. Thermal energy in the previous section we introduced the term thermal energy. Power is measured in joules per second js r o watts w and is worked out using the formula. Neet students should download and practice these questions to get better. Work, energy and power are the most used terms in physics. The terms work, power and energy are often used in our daily conversations but have different meanings in physics. Neet ug students can acces the biggest database of mcqs on. We admire a long distance runner for her stamina or energy. The concept of power is concerned with how rapidly energy is being transferred or transformed when work is done. Along the way, well talk about work, kinetic energy, potential energy, conservation of energy, and mechanical advantage. The potential energy of a system increases if work is done a by the system against a conservative force b by the system against a nonconservative force c upon the system by a conservative force d. Physics work and energy when acting applying force, there is a displacement of the point of application in the direction of the force, is known as work.
Tippens, professor of physics southern polytechnic state university a powerpoint presentation by paul e. As with everything else in physics, these advantages are best realized by being flexible with the choice of models used. The coefficient of friction between the floor and the suitcase is the work done by the force f is. Download neet ug physics work energy mcqs in pdf, chapter wise multiple choice questions mcqs for physics, neet ug physics work energy mcqs.
The unit of energy is, therefore, the same as that of work, that is, joule j. We used this phrase as a catchall to describe the form that. Work and energy a powerpoint presentation by paul e. Energy, kinetic energy, work, dot product, and power 8. In physics, for two objects, the work done is defined as the transfer of energy from the first object to. This means that the work indeed adds to the energy of the package. The dimensions of work are force newtons times distance. Somebody who has the capacity to work for 1416 hours a day is said to have a large stamina or energy.
To register physics tuitions on to clear your doubts. In physics, work is defined as a force acting upon an object, which results in a displacement of the object. Work and energy page 1 of 5 please ignore air resistance, treat all surfaces as frictionless unless otherwise specified or implied. Introduction to work and energy video khan academy. At last we will get a glimpse of the advantages of defining work and energy. Work w is the energy transferred to or from an object by means of a force acting on the object. They are probably the first thing you learn in your physics class. Physics notes class 11 chapter 6 work, energy and power work when a force acts on an object and the object actually moves in the direction of force, then the work is said to be done by the force. Give an example of a situation in which there is a force and a displacement, but the force does no work. Chapter 6 work, kinetic energy and potential energy. Here, youll learn about how its one of the most useful concepts in physics. There the block slides to a stop in a certain distance d. The further it moves under the influence of your force, the more work you perform.
If so, explain how this is accomplished without doing work. But i think when we start doing the math, youll start to get at least a slightly more intuitive notion of what they all are. Work definition if an object moves in response to your application of a force, you have performed work. Work done by the force is equal to the product of the force and. Mcq on work power energy pdf is very important for any competitive exams specially for railway technician, loco pilot, nda, cds and ias. Holt physics problem 5c work kinetic energy theorem problem a forward force of 11. In the diagram below, the spring has a force constant of 5000 nm, the block has a mass of 6. Determining the velocity of a steel ball using a b. Is energy transferred or changed in form in your example. Work is the result of a force, acting over a certain distance. In the figure below, a block slides along a track that descends through distance h.930 854 299 1114 1190 1007 1000 1052 740 1225 879 853 1006 157 830 1192 398 1021 868 1192 321 281 41 1222 340 494 648 325 52 782 170 946 400 145 1353 1431 1433 1170 302 1019 91 1309 787 364