# If an object with a mass of #2 kg # changes speed from #9 m/s# to #12 m/s#, by how much does its kinetic energy change?

##### 1 Answer

Jun 14, 2018

#### Answer:

The change in kinetic energy is

#### Explanation:

The kinetic enegy is

The change in kinetic energy is

The mass is

The initial speed is

The final speed is

The cgange in kinetic energy is