# What is the kinetic energy of a 15 kg object moving at 7 m/s?

Mar 28, 2016

${E}_{k} = 367 , 5 \text{ J}$

#### Explanation:

$\text{The kinetic energy of an object is given as } {E}_{k} = \frac{1}{2.} m \cdot {v}^{2}$
$m : \text{mass of object}$
$v : \text{ speed of object}$

${E}_{k} = \frac{1}{2} \cdot 15 \cdot {7}^{2}$
${E}_{k} = \frac{1}{2} \cdot 15 \cdot 49$
${E}_{k} = 367 , 5 \text{ J}$