Question

what is the kinetic energy of a 1,600kg mustang travelling at 15 m/s (33mph)
1225 j
3920000 j
294 j
180000 j

Explanation:

Step1: Recall kinetic - energy formula

The formula for kinetic energy is $K = \frac{1}{2}mv^{2}$, where $m$ is the mass and $v$ is the velocity.

Step2: Identify given values

$m = 1600\ kg$ and $v = 15\ m/s$.

Step3: Substitute values into formula

$K=\frac{1}{2}\times1600\times(15)^{2}$.
First, calculate $(15)^{2}=225$. Then, $\frac{1}{2}\times1600 = 800$.
So, $K = 800\times225=180000\ J$.

Answer:

D. 180000 J