What this topic covers
Topic P7: Energy has 2 subtopics:
- P7.1 Work done
- P7.2 Power and efficiency
← Back to topics
GCSE OCR Higher Physics · Topic 7 of 9
Topic P7: Energy – GCSE OCR Higher Physics revision notes
Choose a subtopic. OCR Energy: work done, power and efficiency. 14 lessons in 2 subtopics.
Revise Topic P7: Energy for GCSE OCR Higher Physics, including P7.1 Work done and P7.2 Power and efficiency. 14 lessons across 2 subtopics.
14
Lessons
2
Subtopics
Topic P7: Energy lessons by subtopic
14 lessons, grouped by subtopic.
P7.1 Work done
- Introducing Work Done
- Calculating Work Done
- Work Done Against Friction
- Kinetic Energy Calculations
- Elastic Potential Energy Calculations
- Gravitational Potential Energy Calculations
P7.2 Power and efficiency
More in this course
Go back to the full GCSE OCR Higher Physics topic list, or practise this topic with past-paper questions.
Frequently asked questions
What is Topic P7: Energy?
OCR Energy: work done, power and efficiency. 14 lessons in 2 subtopics.
What is the formula for kinetic energy?
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.
What is the equation for power?
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.
What is the formula for elastic potential energy?
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.
What is the equation for work done?
The formula for work done is W = F × d: work done in joules equals force in newtons times distance moved in metres. The Introducing Work Done notes cover this in full.
What is the formula for gravitational potential energy?
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.
What are fossil fuels?
Fossil fuels are energy sources formed from dead organisms buried and compressed over millions of years. The Energy Resources: An Overview notes cover this in full.
What is kinetic energy?
Kinetic energy is the energy stored in moving objects, measured in joules (J). The Kinetic Energy Calculations notes cover this in full.
What is elastic potential energy?
Elastic potential energy is energy stored in a stretched or compressed elastic object that can be released when the object returns to its original shape. The Elastic Potential Energy Calculations notes cover this in full.