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Work Energy Momentum
Question | Answer |
---|---|
Work | (Force * distance) along the direction of a force. Measured in Joules. |
Potential Energy | Energy of interaction. Measured in Joules. |
Gravitational Potential Energy | mgh - gravitational force times height. Work done by the gravitational foce changes the potential energy. |
Kinetic Energy | Energy of motion. Equal to mv^2 / 2. Measured in Joules. |
Power | The rate at which we do work. Equal to Work / Time. Measured in Watts. |
Momentum | (Mass * Velocity) Momentum is a vector. Direction matters! Opposite directions = oppposite signs. |
Impulse | Force * time I=Ft (units are kgm/s) also equal to (∆p; change of momentum) |
Force | mass * acceleration |
kgm/s | unit for impulse |
Joules | Unit for evergy and work |
Watt | Unit of power |
Conservation of Energy | Total energy before is equal to the total energy after. Applied to roller coasters, Potential + kinetic before = potential + Kinetic after. |
Newton's Second Law | F net= mass * acceleration |