Study Online and Download KIPS 9th Class Physics Notes Unit 6: Properties of Matter. Generally, work refers to perform some task or job. In science, work has precise meaning.
Study Online and Download KIPS 9th Class Physics Notes Unit 6: Work and Energy. Generally, work refers to perform some task or job. In science, work has precise meaning. For example, a man carrying a load is doing work but he is not doing work if he is not moving while keeping the load on his head.
Scientifically, work is done only when an effort or force moves an object. When work is done, energy is used. Thus, work and energy are related to each other. The concept of energy is an important concept in Physics. It helps us to identify the changes that occur when work is done This unit deals with the concepts of work, power and energy.
After studying this unit, the students will be able to:
- define work and its SI unit.
- calculate work done using equation
- Work = force x distance moved in the direction of force
- define energy, kinetic energy and potential energy. State
- unit of energy.
- list the different forms of energy with examples. state mass energy equation E = mc2 and solve problems using it.
- describe the process of electricity generation by drawing a block diagram of the process from fossil fuel input to electricity output.
- list the environmental issues associated with power generation.
- explain by drawing energy flow diagrams through steady state systems such as filament lamp, a power station, a vehicle travelling at a constant speed on a level road.
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