Exam-style question
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A car of mass 1200 kg accelerates from rest to a speed of 25 m/s. Calculate the kinetic energy of the car at this speed.
Model answer
What a good answer should say
- The kinetic energy of the car is 375000 J.
Explanation
Why this works
This question tests the understanding of kinetic energy calculation using the formula Ek = 0.5 x m x v^2. By substituting the mass and speed into the formula, the calculation demonstrates the relationship between mass, speed, and kinetic energy.
Common mistake
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