Question

a 3 kg sled moves at a speed of 6.2 m/s. how much kinetic energy does the sled have? remember : $e_k = \frac{1}{2}mv^2$ $e_k = ? j$

Explanation:

Step1: Identify given values

Mass $m=3\ \text{kg}$, speed $v=6.2\ \text{m/s}$

Step2: Substitute into kinetic energy formula

$$E_k = \frac{1}{2}mv^2 = \frac{1}{2} \times 3 \times (6.2)^2$$

Step3: Calculate step-by-step

First compute $6.2^2 = 38.44$, then $\frac{1}{2} \times 3 = 1.5$, finally $1.5 \times 38.44 = 57.66$

Answer:

$57.66\ \text{J}$