# What is the kinetic energy of an object with a mass of #6.25xx10^4# #"g"# having a speed of #"26.3 m/s"#?

##### 2 Answers

The person's kinetic energy is equal to **21.6 kJ**.

#### Explanation:

*Kinetic energy* is simply a measure of how much work needs to be done in order to accelerate an object from complete rest to a given velocity.

Mathematically, kinetic energy is defined as

So, convert the mass of the person from grams to kilograms

Now plug your values into the equation and solve for

Rounded to three sig figs and expressed in kilojoules, the answer will be

#### Explanation:

**Known**

mass =

speed =

**Unknown**

Kinetic energy

**Solution**

(Rounded to three significant figures.)