Across
- 3. activity involving mental or physical effort
- 5. the amount of work done compared to the amount of energy used
- 8. a network consisting of a closed loop, giving a return path for the current
- 9. he energy in an object that is moving
Down
- 1. a flow of electric charge
- 2. the energy stored in an object that is at rest
- 4. the sum of potential energy and kinetic energy
- 6. the ratio of the force produced by a machine to the force applied to it
- 7. the basic mechanical devices for applying a force