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Compute force, mass, or acceleration from Newton's second law, with weight on Earth
Details
Newton's second law relates force, mass, and acceleration.
Equations (three-way solver):
Weight on Earth = m · g (g = 9.80665 m/s²).
Execution
Fill in the form, run the tool, and review the result in one place.
Samples
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Tool usage guide
The Force Calculator helps you quickly solve physics problems using Newton's second law of motion (F = m · a). By inputting any two known variables among force, mass, and acceleration, you can instantly calculate the third, while also determining the object's corresponding weight on Earth.
Background
A hobbyist is building a small mobile robot weighing 12 kg and wants it to accelerate at 1.5 m/s².
Problem
Determine the net force required from the motors to achieve this acceleration.
How to use
Select 'Force (F)' in the 'Solve For' dropdown, enter 12 in the Mass field, and 1.5 in the Acceleration field.
Outcome
The tool calculates a required force of 18 N and displays the robot's weight on Earth as approximately 117.68 N.
Background
A student is analyzing a test vehicle with a mass of 1200 kg subjected to a net forward force of 3600 N.
Problem
Find the acceleration of the vehicle under this force.
How to use
Select 'Acceleration (a)' in the 'Solve For' dropdown, enter 3600 in the Force field, and 1200 in the Mass field.
Outcome
The tool calculates an acceleration of 3 m/s².
Force is measured in Newtons (N), mass in kilograms (kg), and acceleration in meters per second squared (m/s²).
Weight is calculated as mass multiplied by Earth's standard gravitational acceleration (g = 9.80665 m/s²).
No, you must provide both force and acceleration to calculate mass.
It uses the formula a = F / m, dividing the net force by the mass.
No, it calculates net force based on Newton's second law without factoring in external resistive forces.