Motion Lesson 19 - Work
OUTCOME
By the end of the lesson you will have better idea of how difficult energy is to define and recognise the concept of mechanical work is one concept of energy
The mechanical work done by a force to make an object move is a result only of the force acting in the same line as the motion.
So W = F.d or W = Fdcosθ if we have to determine the component of the force.
LEARNING TASKS
Explain
1. How is energy classified?
2. What types of energy have been identified?
3. Which type of energy does this video skip?
4. Why do objects gain kinetic energy when they move?
5. Where does this energy come from?
Explore and Elaborate
In this course we consider mechanical interactions that can be defined as work.
Work = Force x displacement
Evaluate
Try questions Ex 11.3