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19-03-2021
Physics

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A 12-kg sled is moving at a speed of 3.0 m/s. At which of the following speeds will the sled have twice as much kinetic energy?

Respuesta :

19-03-2021

What does "the following" mean ?

Kinetic energy is directly proportional to speed² .

So kinetic energy doubles if the speed is increased by √2 .

(3 m/s) · (√2) = 4.243 m/s

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