MDCAT Physics — Work and Energy
Work and Energy is a core Physics topic in the PMDC MDCAT syllabus, covering 6 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (6)
- Energy
- Energy Losses and Efficiency
- Kinetic Energy and Work-Energy Theorem
- Power
- Work
- Work, Energy & Power
How Work and Energy is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Work and Energy accounts for 58 questions. It appears in 15 of them, about 3.9 questions a paper. The heaviest was MDCAT 2019, with 8 questions, and the most recent is MDCAT 2025, with 3.
| Paper | Questions |
|---|---|
| MDCAT 2025 | 3 |
| MDCAT 2024 | 4 |
| MDCAT 2023 | 4 |
| MDCAT 2022 | 7 |
| MDCAT 2019 | 8 |
| MDCAT 2018 | 4 |
| MDCAT 2017 | 5 |
| MDCAT 2016 | 5 |
| MDCAT 2015 | 5 |
| MDCAT 2014 | 4 |
| MDCAT 2013 | 1 |
| MDCAT 2012 | 1 |
| MDCAT 2010 | 2 |
| MDCAT 2009 | 1 |
| MDCAT 2008 | 4 |
Work and Energy MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2025 · Work and Energy
If P is the momentum of an object and m is its mass, then its kinetic energy is:
- A.P/2m
- B.P²/2m
- C.1/2 Pm
- D.1/2 P2m
Show answer
Answer: B. P²/2m — Kinetic energy in terms of momentum: KE = P²/2m.
- Q2 · MDCAT 2024 · Work and Energy
1KWh = __________ J?
- A.3.6J
- B.3.6KJ
- C.3.6MJ
- D.3.6GJ
Show answer
Answer: C. 3.6MJ — 1 kWh = 1000 W × 3600 s = 3.6 × 10⁶ J = 3.6 MJ.
- Q3 · MDCAT 2023 · Work and Energy
A capacitor of capacitance 'C' has a charge 'Q' and stored energy is 'w'. If the charge is increased to '2Q', the stored energy will be:
- A.2W
- B.4W
- C.W/4
- D.W/2
Show answer
Answer: B. 4W — W = Q²/2C, so doubling the charge (with C fixed) makes the stored energy 4W. The answer key printed with this paper marks 2W, which does not follow from the formula.