Chapter 6, Problem 7PC

Calculate the number of joules of kinetic energy a1-kg parrot has when it flies at 6m/s .

To determine

The kinetic energy.

Answer to Problem 7PC

The kinetic energy is 18J .

Explanation of Solution

Given info: The mass of the parrot is 1kg and the velocity is 6m/s .

Write the expression for the kinetic energy.

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

Here,

m is the mass

v is the velocity

Substitute 1kg for m and 6m/s for v in the above equation to get K .

$$\begin{array}{l}K=\frac{1}{2}\times 1\text{kg}\times {\left(6\text{m}/\text{s}\right)}^2\\ K=\frac{36}{2}\text{kg}\cdot {{\text{m}}^2/\text{s}}^2\times \frac{1\text{J}}{1\text{kg}\cdot {{\text{m}}^2/\text{s}}^2}\\ K=18\text{J}\end{array}$$

Conclusion:

Therefore, the kinetic energy is 18J .