Question detail
If an object has a mass of 2 kg and is moving at a speed of 3 m/s, what is its kinetic energy?
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. 9 J
- B. 6 J
- C. 18 J
- D. 12 J
Answer
9 J
Explanation
The correct option is "9 J". 9 J is right because it directly matches Changes in energy: Recall and apply the equation Ek = 0.5 x m x v^2.. 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
Common Mistake in Kinetic Energy Calculation
Students often forget to square the speed (v) in the kinetic energy equation Ek = 0.5 x m x v^2.
Always remember to square the speed before multiplying by the mass and the 0.5 factor.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.