Physics

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Impulse and Momentum Calculator.

Calculate impulse and one-dimensional momentum from explicit inputs.

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01

Set your values

Results update as you type.

Impulse: 20

Impulse

0.000000
Momentum: 6

Momentum

0.000000

Educational SI models with assumptions stated in each description; verify engineering decisions independently.

Use Cases

Physics homework and exam prep

Quickly verify impulse and momentum calculations for textbook problems involving force, time, mass, and velocity.

Example: Find the impulse when a 10 N force acts for 2 s.

Engineering impact analysis

Estimate the momentum change in collisions or impacts using average force and duration, useful for preliminary design checks.

Example: Calculate the impulse on a 5 kg object moving at 3 m/s.

Frequently Asked Questions

How do I calculate impulse using this calculator?
Enter the average force in newtons (N) and the force duration in seconds (s). The calculator multiplies force by time to give impulse in newton-seconds (N·s).
What is the difference between impulse and momentum?
Impulse is the change in momentum caused by a force acting over time (force × time). Momentum is mass times velocity. This calculator computes both from your inputs.
Can I use this calculator for two-dimensional motion?
No, this calculator is designed for one-dimensional momentum only. It uses scalar values for mass and velocity along a single axis.

Tips & Common Mistakes

Tips

  • Ensure all inputs are in SI units: newtons (N), seconds (s), kilograms (kg), and meters per second (m/s).
  • If you know the change in velocity, you can find the impulse by multiplying mass by the change in velocity.
  • Remember that impulse is a vector quantity; in one dimension, use positive and negative signs to indicate direction.
  • Double-check your force duration: it should be the time the force is applied, not the total time of motion.

Common Mistakes to Avoid

  • Using grams instead of kilograms for mass, which will give incorrect momentum values.
  • Confusing force duration with the total time of motion, leading to wrong impulse calculations.
  • Forgetting that momentum is mass times velocity, not force times time (that's impulse).

Last updated: August 13, 2026