How to Calculate the Mass of a Moving Object

Lighter objects accelerate more strongly.
••• Jupiterimages/ Images

The larger the mass of a moving object, the less readily it moves. According to Newton's second law of motion, the acceleration that the object experiences is inversely proportional to its mass, and you can calculate this acceleration from the object's change in speed over a set amount of time. When the object approaches the speed of light, its mass changes as it moves, but you can ignore this tendency at normal speeds.

    Subtract the object's initial speed from its final speed. If, for instance, it accelerates from 20 m/s to 50 m/s: 50 - 20 = 30 m/s.

    Divide this answer by the time it spends accelerating. For instance, if the object accelerates over the course of 5 seconds: 30 ÷ 5 = 6 m/s².

    Divide the force acting on the body by this acceleration. If, for instance, a force of 12,000 Newtons acts on it: 12,000 ÷ 6 = 2,000. This is the object's mass, measured in kilograms.

Related Articles

Ways to Increase Kinetic Energy
How to Find Acceleration in G's
How to Calculate Kinetic Energy
How to Calculate Tangential Speed
How Does the Force of Momentum Affect an Object in...
How the Mass of an Object Affects Its Motion
How to Calculate Inertial Force of Mass
How to Find the Magnitude When Force & Angle Is Given?
How to Calculate Momentum After a Collision
How to Find the Inertia of an Object
Difference Between Velocity Time Graph & Position Time...
How to Find Velocity From Mass & Height
How to Calculate the Change in Internal Energy
Ways to Increase Kinetic Energy
What Are Some Examples of the Laws of Motion?
How to Calculate the Velocity of an Object Dropped...
How to Convert Horsepower to Thrust
How to Calculate Angular Acceleration
How to Convert Seconds Into Miles Per Hour
How to Calculate Resultant Velocity