OCR A Level Physics A
OCR A Level Physics A Work, Energy and Power Exam Questions
Free OCR A Level Physics A exam questions on Work, Energy and Power, with mark schemes. Covers work done, conservation of energy, kinetic and gravitational potential energy, power and efficiency.
Work, Energy and Power exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
StemUp mark scheme flashcards
OCR A Level Physics A H556 Flashcards (Anki & Quizlet)
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Use them on Anki or Quizlet, then test yourself with the questions on this page.
From £10.99View flashcards
About OCR A Level Physics A Work, Energy and Power
This topic covers energy transfers.
What you need to know
- Work W = Fx cos θ.
- Energy Ek and Ep calculations.
- Power P = W/t and P = Fv.
- Efficiency Useful over total energy.
Common mistakes in Work, Energy and Power
- Missing cos θ.
- Forgetting to square v.
- Confusing energy and power units.
Try three Work, Energy and Power exam-style questions
1. Find Ek of a 1200 kg car at 15 m s⁻¹. (1 mark)
Show the mark scheme answer
135 kJ.
2. Define the joule. (1 mark)
Show the mark scheme answer
Work done by 1 N moving 1 m in the force's direction.
3. A motor lifts 50 N by 2.0 m in 4.0 s. Find power. (1 mark)
Show the mark scheme answer
25 W.
Work, Energy and Power FAQs
What does this topic cover?
Work, energy, power and efficiency.
Is energy always conserved?
Yes, though it may be transferred to less useful stores.
What is P = Fv used for?
Power of a vehicle at constant speed.
Revise this topic with flashcards: OCR A Level Physics A H556 Flashcards, with mark scheme answers for Anki and Quizlet.
