Question

A 300 kg buffalo runs across the prairie with a speed of 8 m/s. What is the kinetic energy of the Buffalo? A:19,200 j B:9600 j C:4800 j D:1200 j

Answer 1

Answer: 9600 J

The kinetic energy $K$  of a body is that energy it possesses due to its movement and is defined as:

$K=\frac{1}{2}mV^{2}$

Where $m$ is the mass of the body and $V$ its velocity .

This has to do with the speed of an object and how much mass it has; basically how the object is moving.

Now, according to this equation and knowing that the mass of the buffalo is $m=300kg$  and its velocity $V=8m/s$ :

$K=\frac{1}{2}(300kg)(8m/s)^{2}$

$K=9600J$

Therefore the correct option is B.