Work and Power in Physics
Explore the concept of work and power in physics with this comprehensive guide. Learn about the definition of work, how to calculate work, the role of force, distance, and energy, and understand the relationship between power and time. Discover the principles of work and machines, and enhance your knowledge of these key physics concepts.
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Presentation Transcript
Chapter 6 Chapter 6 Work and Machines Work and Machines Section 1 Work
What is Work? What is Work? Let s Review and Connect Define energy: ________________________________________________ _______________________________________________________________________ What is a force? _______________________________________________ What unit is used to represent Force? _________ Distance? ____________ What does it mean to describe something as powerful? _______________________ __________________________________________________________________________
What is Work? What is Work? In which picture is the person actually doing work? Why?
What is Work? What is Work? Work: The transfer of energy that occurs when a force makes an object move. Work is measured in Joules. Two things must happen for a force to do work on an object. 1. The force must push or pull on the object. 2. The object must move a distance in the direction of the force applied. Both must happen; otherwise, no work is done!
What is Work? What is Work? Work or NOT Work? Circle the examples that ARE examples of work being done.
Calculating Work Calculating Work
Calculating Work Calculating Work When moving a huge present across the room, you exert a force of 400 Newtons and are able to push it 4 meters. How much work have you done on this ginormous present?
What is Power? What is Power? Power: The amount of work done in a certain amount of time. Power is measured in Watts. Power reflects two variables: Work and Time
Calculating Power Calculating Power
Calculating Power Calculating Power To lift a cookie from the plate to your mouth, 3 joules of work is done. How much power is needed if the cookie is lifted in 0.5 seconds?
Work and Power Work and Power Explain a situation where a force is applied but no work is done? How are work and energy related? How is power related to work?
