AP Police SI practice question
A body of mass 4 kg has a kinetic energy of 72 J. Its speed is:
From a AP Police SI General Awareness practice set · General Awareness
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Correct answer: (D) 6 m/s
KE = ½mv², so 72 = 0.5×4×v² = 2v², giving v²=36 and v=6 m/s.
हिंदी में प्रश्न
4 kg द्रव्यमान वाले एक िपंड की गितज ऊजा 72 J है। उसकी चाल ात कीिजए।
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उत्तर और व्याख्या देखें
सही उत्तर: (D) 6 m/s
KE = ½mv², अत: 72 = 0.5×4×v² = 2v², v²=36, v=6 मीटर/सेकंड।
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