English National Curriculum Science

4. Explore the elastic potential store

Mission Objectives

Define an elastic object

Calculate the energy stored in a stretched or compressed object

Describe the energy transfers in a bouncing object

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KS4-18-04 Lesson Slides KS4-18-04 Mission Assignment KS4-18-04 Handout KS4-18-04-Teacher Answers KS4-18-04 PDF Handout

Keywords

Words and meanings to learn

elastic

able to return to normal shape after being stretched or compressed

potential energy

energy stored in an object due to its position, shape, or state

energy

the capacity to do work

spring

an object that can be stretched by a force and then return to its original shape after the force is removed. Typically a spiral metal coil

proportional

a relationship between two variables. One variable is always a constant value times the other

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Required Resources

Resources: Class presentation and handout, 1 cotton spool, 1 toothpick, 1 elastic band, 4 rubber washers and tape or a paperclip. 

Handout: Discuss Hooke and his work on springs. Summarise his contribution to science. Calculations using the elastic Potential Energy Equation. (Including changing units and changing subject of equation). Make a spool racer and observe results. Use this to explore links between potential energy, kinetic energy and elastic potential energy.

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