Question detail
Which of the following correctly lists the units used to express kinetic energy, mass and speed in the equation Ek = 0.5 × m × v²?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
- A. joule, kilogram, metre per second
- B. joule, gram, metre per second
- C. newton, kilogram, metre per second
- D. joule, kilogram, metre per minute
Answer
joule, kilogram, metre per second
Explanation
The correct option is "joule, kilogram, metre per second". joule, kilogram, metre per second is right because it directly matches Changes in energy: Identify kinetic energy in joules, mass in kilograms and speed in metres per second.. The other options are less suitable because they change the required Physics relationship, confuse the relevant energy store or use a distractor that does not answer the question.
Common mistake
Confusing Units of Measurement
Students often confuse kinetic energy measured in joules with mass measured in kilograms and speed measured in metres per second.
Always remember that kinetic energy is expressed in joules (J), mass in kilograms (kg), and speed in metres per second (m/s). Keep the units distinct and practice converting between them if necessary.
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