Physics Guide

Force Explained: Definition, Formula, Units & Examples

Learn what force means in physics, understand the F = ma formula, force units, examples, and how to calculate force.

Force is a push or pull that can change an object's motion. In physics, force is described using Newton's Second Law, which relates force, mass, and acceleration.

What is force?

Force is an interaction that can change the velocity of an object. A force can accelerate an object, slow it down, or change its direction.

Force formula F = ma

Newton's Second Law gives the force formula F = m × a, where F represents force, m represents mass, and a represents acceleration.

How to calculate force

To calculate force, multiply an object's mass by its acceleration. Use kilograms for mass and meters per second squared for acceleration.

Force unit Newton

The SI unit of force is the newton (N). One newton is the force required to accelerate a one kilogram object by one meter per second squared.

Common force calculation mistakes

Common mistakes include confusing mass with weight, ignoring direction, and using incorrect units.

Frequently Asked Questions

What is the formula for force?

Force is calculated using Newton's Second Law: F = m × a.

What unit is force measured in?

Force is measured in newtons (N).

Related Formulas

Newton's Second Law

F = m × a

Relates net force to mass and acceleration.

Learn formula →

Related Calculators

Related Guides

Newton's Laws of Motion Explained

Learn Newton's three laws of motion, understand force, inertia, acceleration, action and reaction, and solve physics motion problems.

Read guide →

Acceleration Explained: Formula, Units & Examples

Learn what acceleration means, understand the acceleration formula, calculate acceleration, units, examples, and common mistakes.

Read guide →

Physics Fundamentals

Explore essential physics concepts including Newton's Laws, force, acceleration, work, power, kinetic energy, and momentum with formulas and calculators.

Read guide →