What Is a Physics Calculator?
A physics calculator solves common problems in mechanics — velocity, acceleration, force, kinetic energy, and momentum — by applying the standard formulas. It is a versatile tool for students and anyone working through physics problems, removing the arithmetic so you can focus on the concepts. Choose what you want to find, enter the known values, and the calculator returns the result.
How to Use the Calculator
- Select the quantity to solve for — force, energy, velocity, and so on.
- Enter the known values with their units.
- Calculate — see the result.
Core Physics Formulas
| Quantity | Formula |
|---|---|
| Velocity | v = distance ÷ time |
| Acceleration | a = (v − u) ÷ t |
| Force (Newton's 2nd law) | F = m × a |
| Kinetic energy | KE = ½ × m × v² |
| Momentum | p = m × v |
Worked Example
A 2 kg object moving at 3 m/s has kinetic energy KE = ½ × 2 × 3² = ½ × 2 × 9 = 9 joules, and momentum p = 2 × 3 = 6 kg·m/s. If it accelerates from rest to 3 m/s in 1.5 s, its acceleration is (3 − 0) ÷ 1.5 = 2 m/s², requiring a force of F = 2 × 2 = 4 newtons.
Key Units
- Force: newtons (N)
- Energy: joules (J)
- Velocity: meters per second (m/s)
- Momentum: kilogram-meters per second (kg·m/s)
Where Physics Calculations Apply
- Education: mechanics homework and exam practice.
- Engineering: motion, loads, and energy.
- Everyday: understanding speed, braking, and impacts.
Frequently Asked Questions
What is Newton's second law?
Newton's second law states that force equals mass times acceleration: F = m × a. It links the force on an object to how quickly it changes velocity.
How do you calculate kinetic energy?
Kinetic energy is KE = ½ × mass × velocity². A 2 kg object at 3 m/s has KE = ½ × 2 × 9 = 9 joules.
What is momentum?
Momentum is mass times velocity (p = m × v). It measures how much motion an object has and is conserved in collisions.
What is the difference between velocity and acceleration?
Velocity is how fast something moves in a direction, while acceleration is how quickly that velocity changes over time.
Is this physics calculator free?
Yes — it is completely free, requires no signup, and solves a range of mechanics problems.