What force is required to accelerate a body with a mass of 15 kilograms at a rate of 8 m/s²?

Newton's Second law of motion: 

                  Force = (mass) x (acceleration)

                  Force = (15kg) x (8m/s²) = 120 kg-m/s² = 120 newtons

The equation for force is force is equal to mass times acceleration or  where:

- Force or F is measured in Newtons or N (which is also kilogram-meter per second squared), 
- Mass or m is measured in kilograms or kg, and acceleration is measured in meters per second or m/s2. 

This leads to an answer in kilogram-meter per second squared or kg- m/s2So if we multiply a body with a mass of 15 kilograms to a rate of 8 meters per second, we get 120 kilogram-meter per second squared.