Question

The kinetic energy of a body of mass 2 kg moving with a velocity of 2 m/s is........./ 

Answer 1

Answer:

• 1/2×2×2^2
• 4 kg m/s

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Answer 2

Explanation:

Initial kinetic energy

Ki = 1/2 m v^2 = 1/2×2×4= 4 J

Final kinetic energy

Kf = 1/2×2×16 = 16 J

% change in KE

=(Kf - Ki)/Ki ×100

= (16-4)/4 ×100

= 3×100= 300%

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