During the Beijing World Championships. Andy Chua won in the 500 m dash with a time of 45 seconds. His mass is 55kg. How much kinetic energy did he have during the competition?

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Tokamakviz Tokamakviz · Answer 1

[tex]\tt{\huge{\blue{Explanation:}}}[/tex]

The kinetic energy of a moving object is given by

[tex]\boxed{KE = \frac{1}{2}mv^{2}}[/tex]

where:

KE = kinetic energy

m = mass

v = speed

[tex]\tt{\huge{\red{Solution:}}}[/tex]

[tex]v = \dfrac{d}{t}[/tex]

[tex]v = \dfrac{\text{500 m}}{\text{45 s}}[/tex]

v = 11.11111 m/s

[tex]KE = \dfrac{1}{2}mv^{2}[/tex]

[tex]KE = \dfrac{1}{2}(\text{55 kg})(\text{11.11111 m/s})^{2}[/tex]

[tex]\boxed{KE = \text{3,395.06 J}}[/tex]

Therefore, the kinetic energy is 3,395.06 J.

[tex]\\[/tex]

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