Question
A 2 kg object accelerates from 3 m/s to 7 m/s. What is the change in kinetic energy?
Select an option. Your answer will be checked instantly.
Correct Answer: A. 40 J
Explanation:
ΔK=½m(v²-u²).
With m=2, ΔK=49-9 = 40 J.
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