Question

a 30 kg dog runs at a speed of 5 m/s. how much kinetic energy does the dog have? remember : $e_{k} = \frac{1}{2}mv^{2}$ $e_{k} = ? j$

Explanation:

Step1: Identify given values

Mass $m=30\ \text{kg}$, speed $v=5\ \text{m/s}$

Step2: Substitute into kinetic energy formula

$$E_K = \frac{1}{2}mv^2 = \frac{1}{2} \times 30 \times 5^2$$

Step3: Calculate the result

$$E_K = \frac{1}{2} \times 30 \times 25 = 15 \times 25 = 375$$

Answer:

$375$ J