Question

If you throw a 0.2kg ball straight up with an initial speed of 33m/s, how much kinetic energy will it have as you release it? Round to the nearest whole and include the appropriate unit

Answer 1

Given:

The mass of the ball is m = 0.2 kg

The initial speed of the ball is v = 33 m/s

To find the kinetic energy when released.

Explanation:

The kinetic energy of the ball can be calculated by the formula

$K.E.\text{ =}\frac{1}{2}mv^2$

On substituting the values, the kinetic energy of the ball will be

$\begin{gathered} K.E.\text{ = }\frac{1}{2}\times0.2\times(33)^2 \\ =108.9\text{ J} \\ =\text{ 109 J} \end{gathered}$

The kinetic energy of the ball will be 109 J