F = ma
Newton's second law
Force is the push that changes motion. More mass needs more force for the same acceleration; more acceleration needs more force for the same mass.
Make physics feel visible.
Three formulas. One calm place to see what they mean, run your own numbers, and leave with a study summary you can keep.
F = ma
The ideas behind the symbols.
Start with the story each equation tells. The math becomes a compact way to describe that story.
W = Fd
Work and energy
When a force moves something through a distance, energy is transferred. Work is measured in joules.
p = mv
Momentum
Momentum measures how much motion is carried by an object. A heavy object or a fast object has more momentum.
One useful question
What is changing: the object's speed, its position, or the amount of motion it carries? That question usually points you toward the right formula.
Put the numbers on the table.
Use the same inputs to see three connected views of motion. The coach calculates the result and translates it into plain language.
6 Nforce
24 Jwork
10 kg m/smomentum
A 2 kg object accelerating at 3 m/s² needs 6 N of force. Moving it 4 m with that force transfers 24 J of energy. At 5 m/s, it carries 10 kg m/s of momentum.