What this topic covers
Topic 8: Energy - Forces doing work has 2 subtopics:
- Energy stores and transfers
- Work done, kinetic energy and power
GCSE Edexcel Foundation Combined Science Physics · Topic 7 of 13
Choose a subtopic. Work done, power and mechanical energy transfers. 12 lessons in 2 subtopics.
Revise Topic 8: Energy - Forces doing work for GCSE Edexcel Foundation Combined Science Physics, including Energy stores and transfers.
12
Lessons
2
Subtopics
Topic 8: Energy - Forces doing work has 2 subtopics:
12 lessons, grouped by subtopic.
Go back to the full GCSE Edexcel Foundation Combined Science Physics topic list, or practise this topic with past-paper questions.
Work done, power and mechanical energy transfers. 12 lessons in 2 subtopics.
The main energy stores at GCSE are kinetic, thermal, chemical, gravitational potential, elastic potential, magnetic, electrostatic and nuclear. The Energy Stores & Systems: Introduction notes cover this in full.
An energy store is where energy is held in an object or system, because energy is always stored somewhere. The Energy Stores & Systems: Introduction notes cover this in full.
The kinetic energy formula is Ek = ½mv², where m is mass in kg, v is speed in m/s and kinetic energy is in joules (J). The Kinetic Energy Calculations notes cover this in full.
The specific heat capacity equation is ΔE = mcΔθ, where ΔE is the change in thermal energy in joules, m is mass in kg, c is specific heat capacity in J/kg°C and Δθ is the temperature change in °C. The Specific Heat Capacity Explained notes cover this in full.
The power equations are P = E/t and P = W/t: power equals energy transferred, or work done, divided by time. The Calculating Power notes cover this in full.
The elastic potential energy formula is Ee = ½ke², where k is the spring constant in N/m, e is the extension in metres and energy is in joules (J). The Elastic Potential Energy Calculations notes cover this in full.
The specific heat capacity of water is 4200 J/kg°C, which is very high. The Specific Heat Capacity Explained notes cover this in full.
The gravitational potential energy formula is Ep = mgh, where m is mass in kg, g is gravitational field strength in N/kg and h is height in metres. The Gravitational Potential Energy Calculations notes cover this in full.