MDCAT Work and Energy MCQs
Customize your practice drill: select target topics, configure your question limit (up to 180 MCQs per test), and choose your mode.
Total Topics
5
Selected Topics
1
Available MCQs
151
Question Limit
Up to 180
Select Topics to Practice
Questions will be drawn only from checked topics.
Test Configuration
Configure question count (limit 180) and testing mode.
Selected topics have 151 total questions. Test will draw 50 shuffled MCQs.
Sample Work and Energy MCQs with answers
Try these questions, then open the answer to check your reasoning. Use the quiz above for more topics and a complete review.
Work
1. What is the SI unit of work?
- A. Joule
- B. Newton
- C. Watt
- D. None of these
View answer and explanation
Answer: A. Joule
Work is defined as force times displacement, so its SI unit is the newton-meter, which is given the special name joule. One joule is the work done when a force of one newton moves a body one meter in the direction of the force. The newton is the unit of force and the watt is the unit of power (joule per second), so those options are wrong.
Energy Losses
2. A object speeds up from s⁻¹ to s⁻¹. What net work is done on it?
- A.
- B. Cannot be determined from the given data
- C.
- D. -
View answer and explanation
Answer: A.
Kinetic Energy
3. KE of body is increased by 44 %, what is the percentage increase in the momentum?
- A. 10%
- B. 20%
- C. 30%
- D. 40%
View answer and explanation
Answer: B. 20%
Now, let's analyze the relationship between kinetic energy (KE) and momentum (P) of an object:Kinetic Energy ( * m * v^2Momentum ( * vWhere: of the of the objectSince momentum (P) is directly proportional to the velocity (v) of the object, any change in the kinetic energy (KE) that is solely due to a change in velocity will lead to an equal percentage change in momentum (P).Given that the kinetic energy is increased by 44%, this means the velocity is increased by some percentage as well. Since we have no information about the mass of the object or the specific change in velocity, we cannot determine the exact percentage increase in momentum. Therefore, the correct answer is: b) 20%. Option B is correct since:
About this unit
MDCAT Work and Energy — Unit 39
872 practice MCQs covering Work, Kinetic Energy, Potential Energy, Power, Energy Losses. Select custom topics and sit tailored tests up to 180 questions per drill.
Common questions about Work and Energy practice
How many Work and Energy MCQs are available on DIFF. MDCAT?
The current Work and Energy question bank contains 872 practice MCQs across 5 topics. This is the bank size, not the length of one test. Choose your topics and a question count from 1 to 180, limited by the questions available in those topics.
Which topics does the Work and Energy quiz cover?
The selectable topics are Work, Kinetic Energy, Potential Energy, Power, Energy Losses. Use Select all for a broad chapter drill, Clear to start a focused selection, or choose individual topics. Questions are drawn from your chosen topics, so you can target a weak concept before returning to a wider test.
How do I build a custom Work and Energy test?
Open the chapter builder, select one or more topics, enter your question count, and choose Tutor Mode or Timed Exam. The available-question total updates with your selection. Start Test generates a shuffled drill; you do not have to follow a fixed Quiz 1 or Quiz 2 sequence.
What is the difference between Tutor Mode and Timed Exam?
Tutor Mode gives feedback and an explanation after you choose an option, and you can change or clear that choice. Timed Exam runs a countdown and keeps explanations hidden until submission. Both modes let you move between questions, use the paper map, and submit for a complete review.
How do I review and download my Work and Energy quiz?
Select Submit Quiz, then Submit & View Explanations. The review includes every question in your test, all options, your selection, the marked correct answer when a key is available, and the explanation. Download PDF saves a paginated review; Download Review saves an HTML copy you can open in a browser. The review also includes DIFF. MDCAT community links.
How should I use Work and Energy MCQs to improve?
Start with a short tutor drill on one of these topics: Work, Kinetic Energy, Potential Energy. Read the explanation for incorrect and uncertain answers, revise the relevant textbook section, and retry before taking a timed drill. Compare your reasoning with the answer key rather than memorising the option letter.