Question detail
Which unit is NOT used to express speed in the kinetic energy 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. metre per second
- B. metre per minute
- C. metre per hour
- D. metre per second squared
Answer
metre per second squared
Explanation
The correct option is "metre per second squared". metre per second squared 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.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.