Exam-style question
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A car of mass 1000 kg is moving at a speed of 20 m/s. Calculate its kinetic energy.
Model answer
What a good answer should say
- The kinetic energy of the car is 200,000 J.
Explanation
Why this works
This question assesses the understanding of kinetic energy calculations. The formula used is Ek = 0.5 x m x v^2.
Substituting the values, we have Ek = 0.5 x 1000 kg x (20 m/s)^2, leading to a final answer of 200,000 J.
Common mistake
No common mistake is linked to this question yet.