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= The work energy "theorem" = The work energy theorem, $\Delta K = W$ where $K$ is the kinetic energy and $W$ is the net work one on the particle, is A. always valid (in classical mechanics). B. valid only for conservative forces. |
Which force?
Friction, air resistance, tension, spring force, normal force, etc. are all due to
- Gravitational force
- Electromagnetic force
- Strong force
- Weak force
The force is everywhere
When two objects exchange forces, they can do so without having to contact each other.
- Yes
- No
The work energy “theorem”
The work energy theorem, $\Delta K = W$ where $K$ is the kinetic energy and $W$ is the net work one on the particle, is
- always valid (in classical mechanics). B. valid only for conservative forces.