Work done calculations (W = F × s)
I can describe how energy is transferred by a force and calculate the amount.
Work done calculations (W = F × s)
I can describe how energy is transferred by a force and calculate the amount.
Slide deck
Lesson details
Key learning points
- Work done is the total amount of energy transferred.
- Work done = force x distance (moved in the direction of the force).
- Work done is measured in Joule (J).
Common misconception
Pupils often confuse the terms force, energy, and work done and use them interchangeably.
Provide opportunities for pupils to describe events in which the three terms need to be used appropriately, e.g. in describing energy transfers for pushing (force) a crate (doing work) along a level surface (energy transferred).
Keywords
Conservation of energy - The law of conservation of energy states that energy cannot be created or destroyed, but it can be transferred.
Dissipate - Friction can cause energy to dissipate into the surroundings by heating.
Work - Work is done whenever a force makes an object move. The amount of work is force multiplied by distance moved in the direction of the force.
Joule (J) - The unit for measuring energy is the joule (J) which is the same as the unit for measuring energy.
Kilojoule (kJ) - A thousand joules is called a kilojoule (kJ).
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Worksheet
Starter quiz
6 Questions
means an object may take part in a chemical reaction.
means an object may stretch and increase in length.
means an object has mass and is at a position above Earth's surface.
means an object has mass and is moving.
Exit quiz
6 Questions
45 kJ
4500 J
0.45 kJ
45 J