Grade+5+-+Machines+and+Work

Grade 5 - Machines and Work

The grade five part of this science package is all about simple machines and calculating the work done by the simple machines. The unit is directly related to and is an extension to the grade 3 unit on simple machines. The simple machines in this unit are used for the transfer of forces. Those forces are measured so that the measurements can be used to calculate the amount of work done. In the unit students will be exploring different simple machines, but the main focus will be with pulleys and the three classes of levers.

Foundational and Learning Objectives

- Demonstrate how the three classes of levers work. - Demonstrate how to use pulleys to lift a mass. - Compare force required to lift objects directly and with simple machines. - Identify some common applications of simple machines. - Distinguish between simple and compound machines. - Use a spring scale to measure force. - Define work. - Calculate the work done on an object.
 * 1. Explain the principles of simple machines**
 * 2. Work done in moving objects**