Question

The measurement of kinetic energy is

Answer 1

The measurement of kinetic energy (KE) is typically expressed using the formula:

\[
KE = \frac{1}{2}mv^2
\]

where:
- \( KE \) is the kinetic energy,
- \( m \) is the mass of the object (usually measured in kilograms),
- \( v \) is the velocity of the object (measured in meters per second).

Kinetic energy is measured in joules (J) in the International System of Units (SI). To find the kinetic energy of an object, you need to know its mass and its velocity. You'll plug those values into the formula to calculate the kinetic energy.

For example, if you have an object with a mass of 2 kg moving at a speed of 3 m/s, the kinetic energy would be calculated as follows:

\[
KE = \frac{1}{2} \times 2 \, \text{kg} \times (3 \, \text{m/s})^2 = \frac{1}{2} \times 2 \times 9 = 9 \, \text{J}
\]

So the kinetic energy of the object would be 9 joules.