A girl who weighs 30 kg is inline skating at a speed of 5 m/s. What is the girl's kinetic energy?

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A girl who weighs 30 kg is inline skating at a speed of 5 m/s. What is the girl's kinetic energy?

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Answer 1 · 2016-05-23T10:05:34

Kinetic energy of girl is $375 J$ $375 J$

Explanation:

We can find kinetic energy of anybody/particle by plugging its mass and velocity in Kinetic energy equation

$K = \frac{1}{2} m v^{2}$ $K=1/2mv^2$

Where,

$K$ $K$ is kinetic energy of object
$m$ $m$ is mass of object
$v$ $v$ is velocity of object

For this case mass of girl is $30 k g$ $30 kg$
Her velocity is $5 \frac{m}{s}$ $5m/s$

According to equation

$K = \frac{1}{2} m v^{2}$ $K=1/2mv^2$

$K = \frac{1}{2} \cdot 30 \cdot {(5)}^{2}$ $K=1/2*30*(5)^2$

$K = \frac{1}{2} \cdot 30 \cdot 25$ $K=1/2*30*25$

$K = 375 J$ $K=375 J$

Kinetic energy of girl is $375 J$ $375 J$

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A girl who weighs 30 kg is inline skating at a speed of 5 m/s. What is the girl's kinetic energy?

1 Answer

Explanation:

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