Physics
Grade-7
Easy
Question
Identify the correct relation.
Hint:
KE is directly proportional to v²
The correct answer is: ![K E proportional to v squared](data:image/png;base64,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)
We know that kinetic energy is given by -KE=1/2 mv². In this formula mass is constant of a body so KE is directly proportional to v².
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