Question

You throw a baseball with a mass of 0.5 kg. The ball leaves your hand with a speed of 35 m/s. Calculate the kinetic energy. (SHOW ALL WORK)

Answer 1

Answer:

The kinetic energy of the baseball is 306.25 joules.

Explanation:

SInce the baseball can be considered a particle, that is, that effects from geometry can be neglected, the kinetic energy ($K$), in joules, is entirely translational, whose formula is:

$K = \frac{1}{2}\cdot m\cdot v^{2}$ (1)

Where:

$m$ - Mass, in kilograms.

$v$ - Speed, in meters per second.

If we know that $m = 0.5\,kg$ and $v = 35\,\frac{m}{s}$, then the kinetic energy of the baseball thrown by the player is:

$K = \frac{1}{2}\cdot m \cdot v^{2}$

$K = 306.25\,J$

The kinetic energy of the baseball is 306.25 joules.