a 40 kg runner is running at a speed of 3 m/s. how much kinetic energy does the runner have? remember : $e_k…

a 40 kg runner is running at a speed of 3 m/s. how much kinetic energy does the runner have? remember : $e_k = \\frac{1}{2}mv^2$ $e_k = ?$ j

a 40 kg runner is running at a speed of 3 m/s. how much kinetic energy does the runner have? remember : $e_k = \\frac{1}{2}mv^2$ $e_k = ?$ j

Answer

Explanation:

Step1: Identify given values

Mass ( m = 40 , \text{kg} ), speed ( v = 3 , \text{m/s} ), and the formula for kinetic energy ( E_K=\frac{1}{2}mv^2 ).

Step2: Substitute values into formula

Substitute ( m = 40 ) and ( v = 3 ) into ( E_K=\frac{1}{2}mv^2 ): ( E_K=\frac{1}{2}\times40\times(3)^2 )

Step3: Calculate step by step

First, calculate ( (3)^2 = 9 ). Then, ( \frac{1}{2}\times40 = 20 ). Finally, ( 20\times9 = 180 ).

Answer:

180