# 4.1.1.2 Changes in energy

## Content

Students should be able to calculate the amount of energy associated with a moving object, a stretched spring and an object raised above ground level.

The kinetic energy of a moving object can be calculated using the KE equation

The amount of elastic potential energy stored in a stretched spring can be calculated using the Spring equation

The amount of gravitational potential energy gained by an object raised above ground level can be calculated using the GPE equation

WS 1.2 Use a variety of models such as representational, spatial, descriptive, computational and mathematical to solve problems, make predictions and to develop scientific explanations and understanding of familiar and unfamiliar facts.

WS 4.3 - Use SI units (eg kg, g, mg; km, m, mm; kJ, J) and IUPAC chemical nomenclature unless inappropriate.

WS 4.4 -Use prefixes and powers of ten for orders of magnitude (eg tera, giga, mega, kilo, centi, milli, micro and nano).

WS 4.6 - Use an appropriate number of significant figures in calculation.

MS 1a - Recognise and use expressions in decimal form

MS 1c - Use ratios, fractions and percentages

MS 3b Change the subject of an equation

MS 3c Substitute numerical values into algebraic equations using appropriate units for physical quantities

Lessons

P1.3- Energy and work

P1.4 - Graviational energy store

P1.5- Kinetic energy store

P1.A- Spring Energy

Resource sheets

Spring F

Spring F ans

Spring H

Spring H ANS

Videos Open CLosed Isolated Systems.mp4

Systems Indestructible Coating!.mp4

GPE indestructable coating Flyboard® Air Farthest flight by hoverboard (achieved on 30th April 2016 by Franky Zapata).mp4

Fastest hover board wsm.mov

WOrkDONE HighestSKY.mp4

GPE GoPro on a High-Powered Model Rocket!.mp4

KE Crushing a car with water - Wild Weather with Richard Hammond Episode 2 - BBC One.mp4

Mixed EQ TIC_TAC_HIGHER.mp4

SlowMO TICTAK

Pracicals

### Practical / DEMO idea

Demonstration : Newton meters to drag a child across the classroom (sat in a wheelie chair)

8.8 meters with estimated force of 1.3MN

### Practical / DEMO idea

Using childrens popper toys, to let them fire up and record the height in which they can reach. From there calculate the gravitational potential energy. Bring in the concept of paralax, and accuracy and precision.

Worlds Highest Sky DIVE: Mass of a man around 70kgs, and the height was 39,000 meters

### Practical / DEMO idea

Mixing Equations - Ramp, celeotape, ball bearing.

### Practical

TIC-TAK dropping with mobile slowmo