Question detail
A car with a mass of 1,200 kg is traveling at a speed of 20 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. 240,000 J
- B. 120,000 J
- C. 300,000 J
- D. 480,000 J
Answer
240,000 J
Explanation
The correct option is "240,000 J". 240,000 J is right because it answers the Changes in energy objective: Calculate the kinetic energy of a moving object using mass and speed.. The distractors are incorrect because they either use the wrong Physics quantity, confuse an energy store with a transfer, or ignore the wording of this question.
Common mistake
Common Mistake in Kinetic Energy Calculation
Students often forget to square the speed when using the kinetic energy formula, leading to incorrect calculations.
Always remember to apply the formula Ek = 0.5 x m x v^2 correctly, ensuring that the speed (v) is squared.
Related flashcards
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Related practice questions
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