Question

¿Una persona de 60 corriendo a 4 m/s, tiene más energía cinética que un proyectil de 10 gramos a 300 m/s?

Answer 1

Explanation:

The question says that "Does a 60 kg person running at 4 m/s have more kinetic energy than a 10 gram projectile at 300 m/s ? "

Speed of a person is 4 m/s

Mass of a person is 60 kg

Kinetic energy of a person is : $K=\dfrac{1}{2}mv^2$

So,

$K=\dfrac{1}{2}\times 60\times 4^2\\\\K=480\ J$

Mass of a projectile is 10 grams or 0.01 kg

Speed of a projectile is 300 m/s

Kinetic energy of a projectile is :

$K=\dfrac{1}{2}mv^2$

$K=\dfrac{1}{2}\times 0.01\times (300)^2\\\\K=450\ J$

So, it is clear that the kinetic energy of a person is more than that of the kinetic energy of a projectile.