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 \( m = 3 \, \text{kg} \), velocity \( v = 6.2 \, \text{m/s} \), and the formula for kinetic energy \( E_K=\frac{1}{2}mv^2 \).

Step2: Substitute values into the formula

Substitute \( m = 3 \) and \( v = 6.2 \) into \( E_K=\frac{1}{2}mv^2 \).
First, calculate \( v^2=(6.2)^2 = 38.44 \).
Then, calculate \( \frac{1}{2} \times 3 \times 38.44 \).
\( \frac{1}{2} \times 3 = 1.5 \), and \( 1.5 \times 38.44 = 57.66 \).

Answer:

\( 57.66 \)