You will get to learn the definition of energy and observe real-life examples of energy conversions. Then explore the interaction between force and displacement.
After completing this tutorial, you will be able to complete the following:
Why is it insufficient to define energy only as "the capacity to do work"?
~ Sometimes it is difficult to see work being done, such as in mechanical events where a force causes an object to move a certain distance, or in energy conversions. However, it is easier to see a change taking place. Therefore, it is better to define energy as the capacity to cause a change.
Describe the change taking place in each of the following situations in terms of energy:
a) a heater turned on to heat a room
~ When a heater is turned on, the temperature in the room increases. Electrical energy is converted to thermal energy.
b) a lamp on a desk turned on to do homework
~ When a lamp is turned on, it shines light on the work area. Electrical energy is converted to light energy.
c) a plant placed in a sunny corner of a room
~ When a plant stays in the sunny corner of a room for a while, the plant grows. Light energy from the sun is converted into chemical energy.
d) a battery-powered radio turned on in the kitchen
~ When a radio is turned on, chemical energy is converted to electrical energy. Additionally, electrical energy is then converted to sound energy.
|Approximate Time||2 Minutes|
|Pre-requisite Concepts||Students should be able to define the following terms: conversion of energy, energy, and work.|
|Type of Tutorial||Animation|
|Key Vocabulary||conversion of energy, energy, work|