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15 Αυγ 2023 · This document defines key concepts related to work, energy, and power in physics. It defines work as being done when a force moves an object, with the SI unit of work being the joule. Energy is defined as the ability to do work and cause change, with the SI unit being the joule.
Use the equations for mechanical energy and work to show what is work and what is not. Make it clear why holding something off the ground or carrying something over a level surface is not work in the scientific sense.
Questions ask students to identify examples of work, kinetic and potential energy, calculate potential energy given mass and height, calculate work done by lifting objects of a given mass a certain height, and calculate power given work done and time.
This lesson plan is for a Grade 8 science class about work, power, and energy. Students will define and describe the relationships between work, power, and energy through experiments measuring work done and calculating power.
Power is the rate at which work is done. It is the work/time ratio. Mathematically, it is computed using the following equation. Power = Work / time or P = W / t . The standard metric unit of power is the Watt. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time.
Topic: The Work-Energy Relationship. Objectives: To describe the conditions that determine whether the total mechanical energy of a system will be conserved or change; to use such conditions to predict if a given situation will involve energy transfer or energy conservation.
Teacher Toolkit - The Basics of Work, Energy, and Power Objectives: 1. To describe the conditions under which positive and negative work are done and to use the work equation to calculate the amount of work done. 2. To define potential energy, to identify the two forms and the variables that affect the amount of each form, and
