Mechanical Energy II

Physics S S S 2 Second Term

Sub Theme: Conservation Principle

WEEK 4

Mechanical Energy II

Performance Objectives

Students should be able to;

1. Define simple machines and list five examples of simple machines.

2. Define force ratio, velocity ratio and the efficiency of a machine.

3. Calculate the force ratio and efficiency of a simple machine.

4. State how friction can be reduced in the moving parts of a given machine.

Machine and Simple Machine

Content

An arrangement by which work can be done conveniently on a load or against a resistance is known as machine 

A simple machine is a machine in its simplest form. They are devices that use energy to do work. The work is being…